Calculus Examples

$\frac{x^{3} - 3 x^{2} + 3 x - 1}{x^{2} + x - 2}$

Step 1

Write $\frac{x^{3} - 3 x^{2} + 3 x - 1}{x^{2} + x - 2}$ as a function.

$f (x) = \frac{x^{3} - 3 x^{2} + 3 x - 1}{x^{2} + x - 2}$

Step 2

Find the second derivative.

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Step 2.1

Find the first derivative.

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Step 2.1.1

Differentiate using the Quotient Rule which states that $\frac{d}{d x} [\frac{f (x)}{g (x)}]$ is $\frac{g (x) \frac{d}{d x} [f (x)] - f (x) \frac{d}{d x} [g (x)]}{{g (x)}^{2}}$ where $f (x) = x^{3} - 3 x^{2} + 3 x - 1$ and $g (x) = x^{2} + x - 2$ .

$f' (x) = \frac{(x^{2} + x - 2) \frac{d}{d x} (x^{3} - 3 x^{2} + 3 x - 1) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2

Differentiate.

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Step 2.1.2.1

By the Sum Rule, the derivative of $x^{3} - 3 x^{2} + 3 x - 1$ with respect to $x$ is $\frac{d}{d x} [x^{3}] + \frac{d}{d x} [- 3 x^{2}] + \frac{d}{d x} [3 x] + \frac{d}{d x} [- 1]$ .

$f' (x) = \frac{(x^{2} + x - 2) (\frac{d}{d x} (x^{3}) + \frac{d}{d x} (- 3 x^{2}) + \frac{d}{d x} (3 x) + \frac{d}{d x} (- 1)) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.2

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 3$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} + \frac{d}{d x} (- 3 x^{2}) + \frac{d}{d x} (3 x) + \frac{d}{d x} (- 1)) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.3

Since $- 3$ is constant with respect to $x$ , the derivative of $- 3 x^{2}$ with respect to $x$ is $- 3 \frac{d}{d x} [x^{2}]$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 3 \frac{d}{d x} x^{2} + \frac{d}{d x} (3 x) + \frac{d}{d x} (- 1)) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.4

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 3 (2 x) + \frac{d}{d x} (3 x) + \frac{d}{d x} (- 1)) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.5

Multiply $2$ by $- 3$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + \frac{d}{d x} (3 x) + \frac{d}{d x} (- 1)) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.6

Since $3$ is constant with respect to $x$ , the derivative of $3 x$ with respect to $x$ is $3 \frac{d}{d x} [x]$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3 \frac{d}{d x} (x) + \frac{d}{d x} (- 1)) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.7

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3 \cdot 1 + \frac{d}{d x} (- 1)) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.8

Multiply $3$ by $1$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3 + \frac{d}{d x} (- 1)) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.9

Since $- 1$ is constant with respect to $x$ , the derivative of $- 1$ with respect to $x$ is $0$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3 + 0) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.10

Add $3 x^{2} - 6 x + 3$ and $0$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3) - (x^{3} - 3 x^{2} + 3 x - 1) \frac{d}{d x} (x^{2} + x - 2)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.11

By the Sum Rule, the derivative of $x^{2} + x - 2$ with respect to $x$ is $\frac{d}{d x} [x^{2}] + \frac{d}{d x} [x] + \frac{d}{d x} [- 2]$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3) - (x^{3} - 3 x^{2} + 3 x - 1) (\frac{d}{d x} (x^{2}) + \frac{d}{d x} (x) + \frac{d}{d x} (- 2))}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.12

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3) - (x^{3} - 3 x^{2} + 3 x - 1) (2 x + \frac{d}{d x} (x) + \frac{d}{d x} (- 2))}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.13

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3) - (x^{3} - 3 x^{2} + 3 x - 1) (2 x + 1 + \frac{d}{d x} (- 2))}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.14

Since $- 2$ is constant with respect to $x$ , the derivative of $- 2$ with respect to $x$ is $0$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3) - (x^{3} - 3 x^{2} + 3 x - 1) (2 x + 1 + 0)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.2.15

Add $2 x + 1$ and $0$ .

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3) - (x^{3} - 3 x^{2} + 3 x - 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3

Simplify.

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Step 2.1.3.1

Apply the distributive property.

$f' (x) = \frac{(x^{2} + x - 2) (3 x^{2} - 6 x + 3) + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2

Simplify the numerator.

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Step 2.1.3.2.1

Simplify each term.

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Step 2.1.3.2.1.1

Expand $(x^{2} + x - 2) (3 x^{2} - 6 x + 3)$ by multiplying each term in the first expression by each term in the second expression.

$f' (x) = \frac{x^{2} (3 x^{2}) + x^{2} (- 6 x) + x^{2} \cdot 3 + x (3 x^{2}) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2

Simplify each term.

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Step 2.1.3.2.1.2.1

Rewrite using the commutative property of multiplication.

$f' (x) = \frac{3 x^{2} x^{2} + x^{2} (- 6 x) + x^{2} \cdot 3 + x (3 x^{2}) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.2

Multiply $x^{2}$ by $x^{2}$ by adding the exponents.

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Step 2.1.3.2.1.2.2.1

Move $x^{2}$ .

$f' (x) = \frac{3 (x^{2} x^{2}) + x^{2} (- 6 x) + x^{2} \cdot 3 + x (3 x^{2}) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f' (x) = \frac{3 x^{2 + 2} + x^{2} (- 6 x) + x^{2} \cdot 3 + x (3 x^{2}) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.2.3

Add $2$ and $2$ .

$f' (x) = \frac{3 x^{4} + x^{2} (- 6 x) + x^{2} \cdot 3 + x (3 x^{2}) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.3

Rewrite using the commutative property of multiplication.

$f' (x) = \frac{3 x^{4} - 6 x^{2} x + x^{2} \cdot 3 + x (3 x^{2}) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.4

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 2.1.3.2.1.2.4.1

Move $x$ .

$f' (x) = \frac{3 x^{4} - 6 (x \cdot x^{2}) + x^{2} \cdot 3 + x (3 x^{2}) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.4.2

Multiply $x$ by $x^{2}$ .

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Step 2.1.3.2.1.2.4.2.1

Raise $x$ to the power of $1$ .

Step 2.1.3.2.1.2.4.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f' (x) = \frac{3 x^{4} - 6 x^{1 + 2} + x^{2} \cdot 3 + x (3 x^{2}) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.4.3

Add $1$ and $2$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + x^{2} \cdot 3 + x (3 x^{2}) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.5

Move $3$ to the left of $x^{2}$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 \cdot x^{2} + x (3 x^{2}) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.6

Rewrite using the commutative property of multiplication.

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 x \cdot x^{2} + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.7

Multiply $x$ by $x^{2}$ by adding the exponents.

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Step 2.1.3.2.1.2.7.1

Move $x^{2}$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 (x^{2} x) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.7.2

Multiply $x^{2}$ by $x$ .

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Step 2.1.3.2.1.2.7.2.1

Raise $x$ to the power of $1$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 (x^{2} x) + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.7.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 x^{2 + 1} + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.7.3

Add $2$ and $1$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 x^{3} + x (- 6 x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.8

Rewrite using the commutative property of multiplication.

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 x^{3} - 6 x \cdot x + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.9

Multiply $x$ by $x$ by adding the exponents.

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Step 2.1.3.2.1.2.9.1

Move $x$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 x^{3} - 6 (x \cdot x) + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.9.2

Multiply $x$ by $x$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 x^{3} - 6 x^{2} + x \cdot 3 - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.10

Move $3$ to the left of $x$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 x^{3} - 6 x^{2} + 3 \cdot x - 2 (3 x^{2}) - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.11

Multiply $3$ by $- 2$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 x^{3} - 6 x^{2} + 3 x - 6 x^{2} - 2 (- 6 x) - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.12

Multiply $- 6$ by $- 2$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 x^{3} - 6 x^{2} + 3 x - 6 x^{2} + 12 x - 2 \cdot 3 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.2.13

Multiply $- 2$ by $3$ .

$f' (x) = \frac{3 x^{4} - 6 x^{3} + 3 x^{2} + 3 x^{3} - 6 x^{2} + 3 x - 6 x^{2} + 12 x - 6 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.3

Add $- 6 x^{3}$ and $3 x^{3}$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} + 3 x^{2} - 6 x^{2} + 3 x - 6 x^{2} + 12 x - 6 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.4

Subtract $6 x^{2}$ from $3 x^{2}$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 3 x^{2} + 3 x - 6 x^{2} + 12 x - 6 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.5

Subtract $6 x^{2}$ from $- 3 x^{2}$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 3 x + 12 x - 6 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.6

Add $3 x$ and $12 x$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 + (- x^{3} - (- 3 x^{2}) - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.7

Simplify each term.

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Step 2.1.3.2.1.7.1

Multiply $- 3$ by $- 1$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 + (- x^{3} + 3 x^{2} - (3 x) + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.7.2

Multiply $3$ by $- 1$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 + (- x^{3} + 3 x^{2} - 3 x + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.7.3

Multiply $- 1$ by $- 1$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 + (- x^{3} + 3 x^{2} - 3 x + 1) (2 x + 1)}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.8

Expand $(- x^{3} + 3 x^{2} - 3 x + 1) (2 x + 1)$ by multiplying each term in the first expression by each term in the second expression.

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - x^{3} (2 x) - x^{3} \cdot 1 + 3 x^{2} (2 x) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9

Simplify each term.

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Step 2.1.3.2.1.9.1

Rewrite using the commutative property of multiplication.

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 1 \cdot (2 x^{3} x) - x^{3} \cdot 1 + 3 x^{2} (2 x) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.2

Multiply $x^{3}$ by $x$ by adding the exponents.

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Step 2.1.3.2.1.9.2.1

Move $x$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 1 \cdot (2 (x \cdot x^{3})) - x^{3} \cdot 1 + 3 x^{2} (2 x) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.2.2

Multiply $x$ by $x^{3}$ .

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Step 2.1.3.2.1.9.2.2.1

Raise $x$ to the power of $1$ .

Step 2.1.3.2.1.9.2.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 1 \cdot (2 x^{1 + 3}) - x^{3} \cdot 1 + 3 x^{2} (2 x) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.2.3

Add $1$ and $3$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 1 \cdot (2 x^{4}) - x^{3} \cdot 1 + 3 x^{2} (2 x) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.3

Multiply $- 1$ by $2$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} \cdot 1 + 3 x^{2} (2 x) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.4

Multiply $- 1$ by $1$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 3 x^{2} (2 x) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.5

Rewrite using the commutative property of multiplication.

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 3 \cdot (2 x^{2} x) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.6

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 2.1.3.2.1.9.6.1

Move $x$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 3 \cdot (2 (x \cdot x^{2})) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.6.2

Multiply $x$ by $x^{2}$ .

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Step 2.1.3.2.1.9.6.2.1

Raise $x$ to the power of $1$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 3 \cdot (2 (x \cdot x^{2})) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.6.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 3 \cdot (2 x^{1 + 2}) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.6.3

Add $1$ and $2$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 3 \cdot (2 x^{3}) + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.7

Multiply $3$ by $2$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 6 x^{3} + 3 x^{2} \cdot 1 - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.8

Multiply $3$ by $1$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 6 x^{3} + 3 x^{2} - 3 x (2 x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.9

Rewrite using the commutative property of multiplication.

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 6 x^{3} + 3 x^{2} - 3 \cdot (2 x \cdot x) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.10

Multiply $x$ by $x$ by adding the exponents.

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Step 2.1.3.2.1.9.10.1

Move $x$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 6 x^{3} + 3 x^{2} - 3 \cdot (2 (x \cdot x)) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.10.2

Multiply $x$ by $x$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 6 x^{3} + 3 x^{2} - 3 \cdot (2 x^{2}) - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.11

Multiply $- 3$ by $2$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 6 x^{3} + 3 x^{2} - 6 x^{2} - 3 x \cdot 1 + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.12

Multiply $- 3$ by $1$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 6 x^{3} + 3 x^{2} - 6 x^{2} - 3 x + 1 (2 x) + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.13

Multiply $2 x$ by $1$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 6 x^{3} + 3 x^{2} - 6 x^{2} - 3 x + 2 x + 1 \cdot 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.9.14

Multiply $1$ by $1$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} - x^{3} + 6 x^{3} + 3 x^{2} - 6 x^{2} - 3 x + 2 x + 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.10

Add $- x^{3}$ and $6 x^{3}$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} + 5 x^{3} + 3 x^{2} - 6 x^{2} - 3 x + 2 x + 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.11

Subtract $6 x^{2}$ from $3 x^{2}$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} + 5 x^{3} - 3 x^{2} - 3 x + 2 x + 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.1.12

Add $- 3 x$ and $2 x$ .

$f' (x) = \frac{3 x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 - 2 x^{4} + 5 x^{3} - 3 x^{2} - x + 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.2

Subtract $2 x^{4}$ from $3 x^{4}$ .

$f' (x) = \frac{x^{4} - 3 x^{3} - 9 x^{2} + 15 x - 6 + 5 x^{3} - 3 x^{2} - x + 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.3

Add $- 3 x^{3}$ and $5 x^{3}$ .

$f' (x) = \frac{x^{4} + 2 x^{3} - 9 x^{2} + 15 x - 6 - 3 x^{2} - x + 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.4

Subtract $3 x^{2}$ from $- 9 x^{2}$ .

$f' (x) = \frac{x^{4} + 2 x^{3} - 12 x^{2} + 15 x - 6 - x + 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.5

Subtract $x$ from $15 x$ .

$f' (x) = \frac{x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 6 + 1}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.2.6

Add $- 6$ and $1$ .

$f' (x) = \frac{x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5}{{(x^{2} + x - 2)}^{2}}$

Step 2.1.3.3

Simplify the denominator.

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Step 2.1.3.3.1

Factor $x^{2} + x - 2$ using the AC method.

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Step 2.1.3.3.1.1

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $- 2$ and whose sum is $1$ .

$- 1, 2$

Step 2.1.3.3.1.2

Write the factored form using these integers.

$f' (x) = \frac{x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5}{{((x - 1) (x + 2))}^{2}}$

Step 2.1.3.3.2

Apply the product rule to $(x - 1) (x + 2)$ .

$f' (x) = \frac{x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5}{{(x - 1)}^{2} {(x + 2)}^{2}}$

Step 2.2

Find the second derivative.

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Step 2.2.1

Differentiate using the Quotient Rule which states that $\frac{d}{d x} [\frac{f (x)}{g (x)}]$ is $\frac{g (x) \frac{d}{d x} [f (x)] - f (x) \frac{d}{d x} [g (x)]}{{g (x)}^{2}}$ where $f (x) = x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5$ and $g (x) = {(x - 1)}^{2} {(x + 2)}^{2}$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} \frac{d}{d x} (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2

Differentiate.

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Step 2.2.2.1

By the Sum Rule, the derivative of $x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5$ with respect to $x$ is $\frac{d}{d x} [x^{4}] + \frac{d}{d x} [2 x^{3}] + \frac{d}{d x} [- 12 x^{2}] + \frac{d}{d x} [14 x] + \frac{d}{d x} [- 5]$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (\frac{d}{d x} (x^{4}) + \frac{d}{d x} (2 x^{3}) + \frac{d}{d x} (- 12 x^{2}) + \frac{d}{d x} (14 x) + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.2

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 4$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + \frac{d}{d x} (2 x^{3}) + \frac{d}{d x} (- 12 x^{2}) + \frac{d}{d x} (14 x) + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.3

Since $2$ is constant with respect to $x$ , the derivative of $2 x^{3}$ with respect to $x$ is $2 \frac{d}{d x} [x^{3}]$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 2 \frac{d}{d x} (x^{3}) + \frac{d}{d x} (- 12 x^{2}) + \frac{d}{d x} (14 x) + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.4

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 3$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 2 (3 x^{2}) + \frac{d}{d x} (- 12 x^{2}) + \frac{d}{d x} (14 x) + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.5

Multiply $3$ by $2$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} + \frac{d}{d x} (- 12 x^{2}) + \frac{d}{d x} (14 x) + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.6

Since $- 12$ is constant with respect to $x$ , the derivative of $- 12 x^{2}$ with respect to $x$ is $- 12 \frac{d}{d x} [x^{2}]$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 12 \frac{d}{d x} x^{2} + \frac{d}{d x} (14 x) + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.7

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 2$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 12 (2 x) + \frac{d}{d x} (14 x) + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.8

Multiply $2$ by $- 12$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + \frac{d}{d x} (14 x) + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.9

Since $14$ is constant with respect to $x$ , the derivative of $14 x$ with respect to $x$ is $14 \frac{d}{d x} [x]$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14 \frac{d}{d x} (x) + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.10

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14 \cdot 1 + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.11

Multiply $14$ by $1$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14 + \frac{d}{d x} (- 5)) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.12

Since $- 5$ is constant with respect to $x$ , the derivative of $- 5$ with respect to $x$ is $0$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14 + 0) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.2.13

Add $4 x^{3} + 6 x^{2} - 24 x + 14$ and $0$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) \frac{d}{d x} ({(x - 1)}^{2} {(x + 2)}^{2})}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.3

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = {(x - 1)}^{2}$ and $g (x) = {(x + 2)}^{2}$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) ({(x - 1)}^{2} \frac{d}{d x} ({(x + 2)}^{2}) + {(x + 2)}^{2} \frac{d}{d x} ({(x - 1)}^{2}))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.4

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{2}$ and $g (x) = x + 2$ .

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Step 2.2.4.1

To apply the Chain Rule, set $u_{1}$ as $x + 2$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) ({(x - 1)}^{2} (\frac{d}{d u (1)} ({u_{1}}^{2}) \frac{d}{d x} (x + 2)) + {(x + 2)}^{2} \frac{d}{d x} ({(x - 1)}^{2}))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.4.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{1}} [{u_{1}}^{n}]$ is $n {u_{1}}^{n - 1}$ where $n = 2$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) ({(x - 1)}^{2} (2 u_{1} \frac{d}{d x} (x + 2)) + {(x + 2)}^{2} \frac{d}{d x} ({(x - 1)}^{2}))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.4.3

Replace all occurrences of $u_{1}$ with $x + 2$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) ({(x - 1)}^{2} (2 (x + 2) \frac{d}{d x} (x + 2)) + {(x + 2)}^{2} \frac{d}{d x} ({(x - 1)}^{2}))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.5

Differentiate.

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Step 2.2.5.1

Move $2$ to the left of ${(x - 1)}^{2}$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 \cdot ({(x - 1)}^{2} (x + 2)) \frac{d}{d x} (x + 2) + {(x + 2)}^{2} \frac{d}{d x} ({(x - 1)}^{2}))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.5.2

By the Sum Rule, the derivative of $x + 2$ with respect to $x$ is $\frac{d}{d x} [x] + \frac{d}{d x} [2]$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) (\frac{d}{d x} (x) + \frac{d}{d x} (2)) + {(x + 2)}^{2} \frac{d}{d x} ({(x - 1)}^{2}))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.5.3

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) (1 + \frac{d}{d x} (2)) + {(x + 2)}^{2} \frac{d}{d x} ({(x - 1)}^{2}))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.5.4

Since $2$ is constant with respect to $x$ , the derivative of $2$ with respect to $x$ is $0$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) (1 + 0) + {(x + 2)}^{2} \frac{d}{d x} ({(x - 1)}^{2}))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.5.5

Simplify the expression.

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Step 2.2.5.5.1

Add $1$ and $0$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) \cdot 1 + {(x + 2)}^{2} \frac{d}{d x} ({(x - 1)}^{2}))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.5.5.2

Multiply $2$ by $1$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + {(x + 2)}^{2} \frac{d}{d x} ({(x - 1)}^{2}))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.6

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{2}$ and $g (x) = x - 1$ .

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Step 2.2.6.1

To apply the Chain Rule, set $u_{2}$ as $x - 1$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + {(x + 2)}^{2} (\frac{d}{d u (2)} ({u_{2}}^{2}) \frac{d}{d x} (x - 1)))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.6.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{2}} [{u_{2}}^{n}]$ is $n {u_{2}}^{n - 1}$ where $n = 2$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + {(x + 2)}^{2} (2 u_{2} \frac{d}{d x} (x - 1)))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.6.3

Replace all occurrences of $u_{2}$ with $x - 1$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + {(x + 2)}^{2} (2 (x - 1) \frac{d}{d x} (x - 1)))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.7

Differentiate.

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Step 2.2.7.1

Move $2$ to the left of ${(x + 2)}^{2}$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + 2 \cdot ({(x + 2)}^{2} (x - 1)) \frac{d}{d x} (x - 1))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.7.2

By the Sum Rule, the derivative of $x - 1$ with respect to $x$ is $\frac{d}{d x} [x] + \frac{d}{d x} [- 1]$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1) (\frac{d}{d x} (x) + \frac{d}{d x} (- 1)))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.7.3

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1) (1 + \frac{d}{d x} (- 1)))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.7.4

Since $- 1$ is constant with respect to $x$ , the derivative of $- 1$ with respect to $x$ is $0$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1) (1 + 0))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.7.5

Simplify the expression.

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Step 2.2.7.5.1

Add $1$ and $0$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1) \cdot 1)}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.7.5.2

Multiply $2$ by $1$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2} {(x + 2)}^{2})}^{2}}$

Step 2.2.8

Simplify.

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Step 2.2.8.1

Apply the product rule to ${(x - 1)}^{2} {(x + 2)}^{2}$ .

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) - (x^{4} + 2 x^{3} - 12 x^{2} + 14 x - 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.2

Apply the distributive property.

$f'' (x) = \frac{{(x - 1)}^{2} {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3

Simplify the numerator.

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Step 2.2.8.3.1

Rewrite ${(x - 1)}^{2}$ as $(x - 1) (x - 1)$ .

$f'' (x) = \frac{(x - 1) (x - 1) {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.2

Expand $(x - 1) (x - 1)$ using the FOIL Method.

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Step 2.2.8.3.2.1

Apply the distributive property.

$f'' (x) = \frac{(x (x - 1) - 1 (x - 1)) {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.2.2

Apply the distributive property.

$f'' (x) = \frac{(x \cdot x + x \cdot - 1 - 1 (x - 1)) {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.2.3

Apply the distributive property.

$f'' (x) = \frac{(x \cdot x + x \cdot - 1 - 1 x - 1 \cdot - 1) {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.3

Simplify and combine like terms.

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Step 2.2.8.3.3.1

Simplify each term.

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Step 2.2.8.3.3.1.1

Multiply $x$ by $x$ .

$f'' (x) = \frac{(x^{2} + x \cdot - 1 - 1 x - 1 \cdot - 1) {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.3.1.2

Move $- 1$ to the left of $x$ .

$f'' (x) = \frac{(x^{2} - 1 \cdot x - 1 x - 1 \cdot - 1) {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.3.1.3

Rewrite $- 1 x$ as $- x$ .

$f'' (x) = \frac{(x^{2} - x - 1 x - 1 \cdot - 1) {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.3.1.4

Rewrite $- 1 x$ as $- x$ .

$f'' (x) = \frac{(x^{2} - x - x - 1 \cdot - 1) {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.3.1.5

Multiply $- 1$ by $- 1$ .

$f'' (x) = \frac{(x^{2} - x - x + 1) {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.3.2

Subtract $x$ from $- x$ .

$f'' (x) = \frac{(x^{2} - 2 x + 1) {(x + 2)}^{2} (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.4

Rewrite ${(x + 2)}^{2}$ as $(x + 2) (x + 2)$ .

$f'' (x) = \frac{(x^{2} - 2 x + 1) ((x + 2) (x + 2)) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.5

Expand $(x + 2) (x + 2)$ using the FOIL Method.

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Step 2.2.8.3.5.1

Apply the distributive property.

$f'' (x) = \frac{(x^{2} - 2 x + 1) (x (x + 2) + 2 (x + 2)) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.5.2

Apply the distributive property.

$f'' (x) = \frac{(x^{2} - 2 x + 1) (x \cdot x + x \cdot 2 + 2 (x + 2)) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.5.3

Apply the distributive property.

$f'' (x) = \frac{(x^{2} - 2 x + 1) (x \cdot x + x \cdot 2 + 2 x + 2 \cdot 2) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.6

Simplify and combine like terms.

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Step 2.2.8.3.6.1

Simplify each term.

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Step 2.2.8.3.6.1.1

Multiply $x$ by $x$ .

$f'' (x) = \frac{(x^{2} - 2 x + 1) (x^{2} + x \cdot 2 + 2 x + 2 \cdot 2) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.6.1.2

Move $2$ to the left of $x$ .

$f'' (x) = \frac{(x^{2} - 2 x + 1) (x^{2} + 2 \cdot x + 2 x + 2 \cdot 2) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.6.1.3

Multiply $2$ by $2$ .

$f'' (x) = \frac{(x^{2} - 2 x + 1) (x^{2} + 2 x + 2 x + 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.6.2

Add $2 x$ and $2 x$ .

$f'' (x) = \frac{(x^{2} - 2 x + 1) (x^{2} + 4 x + 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.7

Expand $(x^{2} - 2 x + 1) (x^{2} + 4 x + 4)$ by multiplying each term in the first expression by each term in the second expression.

$f'' (x) = \frac{(x^{2} x^{2} + x^{2} (4 x) + x^{2} \cdot 4 - 2 x \cdot x^{2} - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8

Simplify each term.

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Step 2.2.8.3.8.1

Multiply $x^{2}$ by $x^{2}$ by adding the exponents.

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Step 2.2.8.3.8.1.1

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{(x^{2 + 2} + x^{2} (4 x) + x^{2} \cdot 4 - 2 x \cdot x^{2} - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.1.2

Add $2$ and $2$ .

$f'' (x) = \frac{(x^{4} + x^{2} (4 x) + x^{2} \cdot 4 - 2 x \cdot x^{2} - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.2

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{(x^{4} + 4 x^{2} x + x^{2} \cdot 4 - 2 x \cdot x^{2} - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.3

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 2.2.8.3.8.3.1

Move $x$ .

$f'' (x) = \frac{(x^{4} + 4 (x \cdot x^{2}) + x^{2} \cdot 4 - 2 x \cdot x^{2} - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.3.2

Multiply $x$ by $x^{2}$ .

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Step 2.2.8.3.8.3.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.8.3.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{(x^{4} + 4 x^{1 + 2} + x^{2} \cdot 4 - 2 x \cdot x^{2} - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.3.3

Add $1$ and $2$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + x^{2} \cdot 4 - 2 x \cdot x^{2} - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.4

Move $4$ to the left of $x^{2}$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 \cdot x^{2} - 2 x \cdot x^{2} - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.5

Multiply $x$ by $x^{2}$ by adding the exponents.

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Step 2.2.8.3.8.5.1

Move $x^{2}$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 (x^{2} x) - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.5.2

Multiply $x^{2}$ by $x$ .

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Step 2.2.8.3.8.5.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.8.5.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 x^{2 + 1} - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.5.3

Add $2$ and $1$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 x^{3} - 2 x (4 x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.6

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 x^{3} - 2 \cdot (4 x \cdot x) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.7

Multiply $x$ by $x$ by adding the exponents.

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Step 2.2.8.3.8.7.1

Move $x$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 x^{3} - 2 \cdot (4 (x \cdot x)) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.7.2

Multiply $x$ by $x$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 x^{3} - 2 \cdot (4 x^{2}) - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.8

Multiply $- 2$ by $4$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 x^{3} - 8 x^{2} - 2 x \cdot 4 + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.9

Multiply $4$ by $- 2$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 x^{3} - 8 x^{2} - 8 x + 1 x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.10

Multiply $x^{2}$ by $1$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 x^{3} - 8 x^{2} - 8 x + x^{2} + 1 (4 x) + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.11

Multiply $4 x$ by $1$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 x^{3} - 8 x^{2} - 8 x + x^{2} + 4 x + 1 \cdot 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.8.12

Multiply $4$ by $1$ .

$f'' (x) = \frac{(x^{4} + 4 x^{3} + 4 x^{2} - 2 x^{3} - 8 x^{2} - 8 x + x^{2} + 4 x + 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.9

Subtract $2 x^{3}$ from $4 x^{3}$ .

$f'' (x) = \frac{(x^{4} + 2 x^{3} + 4 x^{2} - 8 x^{2} - 8 x + x^{2} + 4 x + 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.10

Subtract $8 x^{2}$ from $4 x^{2}$ .

$f'' (x) = \frac{(x^{4} + 2 x^{3} - 4 x^{2} - 8 x + x^{2} + 4 x + 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.11

Add $- 4 x^{2}$ and $x^{2}$ .

$f'' (x) = \frac{(x^{4} + 2 x^{3} - 3 x^{2} - 8 x + 4 x + 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.12

Add $- 8 x$ and $4 x$ .

$f'' (x) = \frac{(x^{4} + 2 x^{3} - 3 x^{2} - 4 x + 4) (4 x^{3} + 6 x^{2} - 24 x + 14) + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.13

Expand $(x^{4} + 2 x^{3} - 3 x^{2} - 4 x + 4) (4 x^{3} + 6 x^{2} - 24 x + 14)$ by multiplying each term in the first expression by each term in the second expression.

$f'' (x) = \frac{x^{4} (4 x^{3}) + x^{4} (6 x^{2}) + x^{4} (- 24 x) + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14

Simplify each term.

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Step 2.2.8.3.14.1

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{4} x^{3} + x^{4} (6 x^{2}) + x^{4} (- 24 x) + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.2

Multiply $x^{4}$ by $x^{3}$ by adding the exponents.

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Step 2.2.8.3.14.2.1

Move $x^{3}$ .

$f'' (x) = \frac{4 (x^{3} x^{4}) + x^{4} (6 x^{2}) + x^{4} (- 24 x) + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{3 + 4} + x^{4} (6 x^{2}) + x^{4} (- 24 x) + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.2.3

Add $3$ and $4$ .

$f'' (x) = \frac{4 x^{7} + x^{4} (6 x^{2}) + x^{4} (- 24 x) + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.3

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{4} x^{2} + x^{4} (- 24 x) + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.4

Multiply $x^{4}$ by $x^{2}$ by adding the exponents.

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Step 2.2.8.3.14.4.1

Move $x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 6 (x^{2} x^{4}) + x^{4} (- 24 x) + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.4.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 6 x^{2 + 4} + x^{4} (- 24 x) + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.4.3

Add $2$ and $4$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} + x^{4} (- 24 x) + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.5

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{4} x + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.6

Multiply $x^{4}$ by $x$ by adding the exponents.

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Step 2.2.8.3.14.6.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 (x \cdot x^{4}) + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.6.2

Multiply $x$ by $x^{4}$ .

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Step 2.2.8.3.14.6.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.14.6.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{1 + 4} + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.6.3

Add $1$ and $4$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + x^{4} \cdot 14 + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.7

Move $14$ to the left of $x^{4}$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 \cdot x^{4} + 2 x^{3} (4 x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.8

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 2 \cdot (4 x^{3} x^{3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.9

Multiply $x^{3}$ by $x^{3}$ by adding the exponents.

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Step 2.2.8.3.14.9.1

Move $x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 2 \cdot (4 (x^{3} x^{3})) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.9.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 2 \cdot (4 x^{3 + 3}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.9.3

Add $3$ and $3$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 2 \cdot (4 x^{6}) + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.10

Multiply $2$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 2 x^{3} (6 x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.11

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 2 \cdot (6 x^{3} x^{2}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.12

Multiply $x^{3}$ by $x^{2}$ by adding the exponents.

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Step 2.2.8.3.14.12.1

Move $x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 2 \cdot (6 (x^{2} x^{3})) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.12.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 2 \cdot (6 x^{2 + 3}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.12.3

Add $2$ and $3$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 2 \cdot (6 x^{5}) + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.13

Multiply $2$ by $6$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} + 2 x^{3} (- 24 x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.14

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} + 2 \cdot (- 24 x^{3} x) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.15

Multiply $x^{3}$ by $x$ by adding the exponents.

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Step 2.2.8.3.14.15.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} + 2 \cdot (- 24 (x \cdot x^{3})) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.15.2

Multiply $x$ by $x^{3}$ .

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Step 2.2.8.3.14.15.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.14.15.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} + 2 \cdot (- 24 x^{1 + 3}) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.15.3

Add $1$ and $3$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} + 2 \cdot (- 24 x^{4}) + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.16

Multiply $2$ by $- 24$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 2 x^{3} \cdot 14 - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.17

Multiply $14$ by $2$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 3 x^{2} (4 x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.18

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 3 \cdot (4 x^{2} x^{3}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.19

Multiply $x^{2}$ by $x^{3}$ by adding the exponents.

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Step 2.2.8.3.14.19.1

Move $x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 3 \cdot (4 (x^{3} x^{2})) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.19.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 3 \cdot (4 x^{3 + 2}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.19.3

Add $3$ and $2$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 3 \cdot (4 x^{5}) - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.20

Multiply $- 3$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 3 x^{2} (6 x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.21

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 3 \cdot (6 x^{2} x^{2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.22

Multiply $x^{2}$ by $x^{2}$ by adding the exponents.

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Step 2.2.8.3.14.22.1

Move $x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 3 \cdot (6 (x^{2} x^{2})) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.22.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 3 \cdot (6 x^{2 + 2}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.22.3

Add $2$ and $2$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 3 \cdot (6 x^{4}) - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.23

Multiply $- 3$ by $6$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} - 3 x^{2} (- 24 x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.24

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} - 3 \cdot (- 24 x^{2} x) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.25

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 2.2.8.3.14.25.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} - 3 \cdot (- 24 (x \cdot x^{2})) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.25.2

Multiply $x$ by $x^{2}$ .

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Step 2.2.8.3.14.25.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.14.25.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} - 3 \cdot (- 24 x^{1 + 2}) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.25.3

Add $1$ and $2$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} - 3 \cdot (- 24 x^{3}) - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.26

Multiply $- 3$ by $- 24$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 3 x^{2} \cdot 14 - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.27

Multiply $14$ by $- 3$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 4 x (4 x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.28

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 4 \cdot (4 x \cdot x^{3}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.29

Multiply $x$ by $x^{3}$ by adding the exponents.

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Step 2.2.8.3.14.29.1

Move $x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 4 \cdot (4 (x^{3} x)) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.29.2

Multiply $x^{3}$ by $x$ .

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Step 2.2.8.3.14.29.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.14.29.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 4 \cdot (4 x^{3 + 1}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.29.3

Add $3$ and $1$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 4 \cdot (4 x^{4}) - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.30

Multiply $- 4$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 4 x (6 x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.31

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 4 \cdot (6 x \cdot x^{2}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.32

Multiply $x$ by $x^{2}$ by adding the exponents.

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Step 2.2.8.3.14.32.1

Move $x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 4 \cdot (6 (x^{2} x)) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.32.2

Multiply $x^{2}$ by $x$ .

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Step 2.2.8.3.14.32.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.14.32.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 4 \cdot (6 x^{2 + 1}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.32.3

Add $2$ and $1$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 4 \cdot (6 x^{3}) - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.33

Multiply $- 4$ by $6$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} - 4 x (- 24 x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.34

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} - 4 \cdot (- 24 x \cdot x) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.35

Multiply $x$ by $x$ by adding the exponents.

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Step 2.2.8.3.14.35.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} - 4 \cdot (- 24 (x \cdot x)) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.35.2

Multiply $x$ by $x$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} - 4 \cdot (- 24 x^{2}) - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.36

Multiply $- 4$ by $- 24$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 4 x \cdot 14 + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.37

Multiply $14$ by $- 4$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 4 (4 x^{3}) + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.38

Multiply $4$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 4 (6 x^{2}) + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.39

Multiply $6$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} + 4 (- 24 x) + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.40

Multiply $- 24$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 4 \cdot 14 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.14.41

Multiply $4$ by $14$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.15

Combine the opposite terms in $4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} + 12 x^{5} - 48 x^{4} + 28 x^{3} - 12 x^{5} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 56$ .

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Step 2.2.8.3.15.1

Subtract $12 x^{5}$ from $12 x^{5}$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} - 48 x^{4} + 28 x^{3} + 0 - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.15.2

Add $4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} - 48 x^{4} + 28 x^{3}$ and $0$ .

$f'' (x) = \frac{4 x^{7} + 6 x^{6} - 24 x^{5} + 14 x^{4} + 8 x^{6} - 48 x^{4} + 28 x^{3} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.16

Add $6 x^{6}$ and $8 x^{6}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} + 14 x^{4} - 48 x^{4} + 28 x^{3} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.17

Subtract $48 x^{4}$ from $14 x^{4}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 34 x^{4} + 28 x^{3} - 18 x^{4} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.18

Subtract $18 x^{4}$ from $- 34 x^{4}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 52 x^{4} + 28 x^{3} + 72 x^{3} - 42 x^{2} - 16 x^{4} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.19

Subtract $16 x^{4}$ from $- 52 x^{4}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 28 x^{3} + 72 x^{3} - 42 x^{2} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.20

Add $28 x^{3}$ and $72 x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 100 x^{3} - 42 x^{2} - 24 x^{3} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.21

Subtract $24 x^{3}$ from $100 x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 76 x^{3} - 42 x^{2} + 96 x^{2} - 56 x + 16 x^{3} + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.22

Add $76 x^{3}$ and $16 x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} - 42 x^{2} + 96 x^{2} - 56 x + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.23

Add $- 42 x^{2}$ and $96 x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 54 x^{2} - 56 x + 24 x^{2} - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.24

Add $54 x^{2}$ and $24 x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 56 x - 96 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.25

Subtract $96 x$ from $- 56 x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - (2 x^{3}) - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.26

Simplify each term.

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Step 2.2.8.3.26.1

Multiply $2$ by $- 1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} - (- 12 x^{2}) - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.26.2

Multiply $- 12$ by $- 1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - (14 x) + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.26.3

Multiply $14$ by $- 1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 {(x - 1)}^{2} (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.26.4

Multiply $- 1$ by $- 5$ .

Step 2.2.8.3.27

Simplify each term.

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Step 2.2.8.3.27.1

Rewrite ${(x - 1)}^{2}$ as $(x - 1) (x - 1)$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 ((x - 1) (x - 1)) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.2

Expand $(x - 1) (x - 1)$ using the FOIL Method.

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Step 2.2.8.3.27.2.1

Apply the distributive property.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 (x (x - 1) - 1 (x - 1)) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.2.2

Apply the distributive property.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 (x \cdot x + x \cdot - 1 - 1 (x - 1)) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.2.3

Apply the distributive property.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 (x \cdot x + x \cdot - 1 - 1 x - 1 \cdot - 1) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.3

Simplify and combine like terms.

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Step 2.2.8.3.27.3.1

Simplify each term.

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Step 2.2.8.3.27.3.1.1

Multiply $x$ by $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 (x^{2} + x \cdot - 1 - 1 x - 1 \cdot - 1) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.3.1.2

Move $- 1$ to the left of $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 (x^{2} - 1 \cdot x - 1 x - 1 \cdot - 1) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.3.1.3

Rewrite $- 1 x$ as $- x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 (x^{2} - x - 1 x - 1 \cdot - 1) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.3.1.4

Rewrite $- 1 x$ as $- x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 (x^{2} - x - x - 1 \cdot - 1) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.3.1.5

Multiply $- 1$ by $- 1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 (x^{2} - x - x + 1) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.3.2

Subtract $x$ from $- x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 (x^{2} - 2 x + 1) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.4

Apply the distributive property.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) ((2 x^{2} + 2 (- 2 x) + 2 \cdot 1) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.5

Simplify.

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Step 2.2.8.3.27.5.1

Multiply $- 2$ by $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) ((2 x^{2} - 4 x + 2 \cdot 1) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.5.2

Multiply $2$ by $1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) ((2 x^{2} - 4 x + 2) (x + 2) + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.6

Expand $(2 x^{2} - 4 x + 2) (x + 2)$ by multiplying each term in the first expression by each term in the second expression.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{2} x + 2 x^{2} \cdot 2 - 4 x \cdot x - 4 x \cdot 2 + 2 x + 2 \cdot 2 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.7

Simplify each term.

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Step 2.2.8.3.27.7.1

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 2.2.8.3.27.7.1.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 (x \cdot x^{2}) + 2 x^{2} \cdot 2 - 4 x \cdot x - 4 x \cdot 2 + 2 x + 2 \cdot 2 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.7.1.2

Multiply $x$ by $x^{2}$ .

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Step 2.2.8.3.27.7.1.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.27.7.1.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{1 + 2} + 2 x^{2} \cdot 2 - 4 x \cdot x - 4 x \cdot 2 + 2 x + 2 \cdot 2 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.7.1.3

Add $1$ and $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} + 2 x^{2} \cdot 2 - 4 x \cdot x - 4 x \cdot 2 + 2 x + 2 \cdot 2 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.7.2

Multiply $2$ by $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} + 4 x^{2} - 4 x \cdot x - 4 x \cdot 2 + 2 x + 2 \cdot 2 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.7.3

Multiply $x$ by $x$ by adding the exponents.

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Step 2.2.8.3.27.7.3.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} + 4 x^{2} - 4 (x \cdot x) - 4 x \cdot 2 + 2 x + 2 \cdot 2 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.7.3.2

Multiply $x$ by $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} + 4 x^{2} - 4 x^{2} - 4 x \cdot 2 + 2 x + 2 \cdot 2 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.7.4

Multiply $2$ by $- 4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} + 4 x^{2} - 4 x^{2} - 8 x + 2 x + 2 \cdot 2 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.7.5

Multiply $2$ by $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} + 4 x^{2} - 4 x^{2} - 8 x + 2 x + 4 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.8

Combine the opposite terms in $2 x^{3} + 4 x^{2} - 4 x^{2} - 8 x + 2 x + 4$ .

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Step 2.2.8.3.27.8.1

Subtract $4 x^{2}$ from $4 x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} + 0 - 8 x + 2 x + 4 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.8.2

Add $2 x^{3}$ and $0$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 8 x + 2 x + 4 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.9

Add $- 8 x$ and $2 x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 {(x + 2)}^{2} (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.10

Rewrite ${(x + 2)}^{2}$ as $(x + 2) (x + 2)$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 ((x + 2) (x + 2)) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.11

Expand $(x + 2) (x + 2)$ using the FOIL Method.

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Step 2.2.8.3.27.11.1

Apply the distributive property.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 (x (x + 2) + 2 (x + 2)) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.11.2

Apply the distributive property.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 (x \cdot x + x \cdot 2 + 2 (x + 2)) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.11.3

Apply the distributive property.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 (x \cdot x + x \cdot 2 + 2 x + 2 \cdot 2) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.12

Simplify and combine like terms.

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Step 2.2.8.3.27.12.1

Simplify each term.

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Step 2.2.8.3.27.12.1.1

Multiply $x$ by $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 (x^{2} + x \cdot 2 + 2 x + 2 \cdot 2) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.12.1.2

Move $2$ to the left of $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 (x^{2} + 2 \cdot x + 2 x + 2 \cdot 2) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.12.1.3

Multiply $2$ by $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 (x^{2} + 2 x + 2 x + 4) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.12.2

Add $2 x$ and $2 x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 (x^{2} + 4 x + 4) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.13

Apply the distributive property.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + (2 x^{2} + 2 (4 x) + 2 \cdot 4) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.14

Simplify.

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Step 2.2.8.3.27.14.1

Multiply $4$ by $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + (2 x^{2} + 8 x + 2 \cdot 4) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.14.2

Multiply $2$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + (2 x^{2} + 8 x + 8) (x - 1))}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.15

Expand $(2 x^{2} + 8 x + 8) (x - 1)$ by multiplying each term in the first expression by each term in the second expression.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{2} x + 2 x^{2} \cdot - 1 + 8 x \cdot x + 8 x \cdot - 1 + 8 x + 8 \cdot - 1)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.16

Simplify each term.

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Step 2.2.8.3.27.16.1

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 2.2.8.3.27.16.1.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 (x \cdot x^{2}) + 2 x^{2} \cdot - 1 + 8 x \cdot x + 8 x \cdot - 1 + 8 x + 8 \cdot - 1)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.16.1.2

Multiply $x$ by $x^{2}$ .

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Step 2.2.8.3.27.16.1.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.27.16.1.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{1 + 2} + 2 x^{2} \cdot - 1 + 8 x \cdot x + 8 x \cdot - 1 + 8 x + 8 \cdot - 1)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.16.1.3

Add $1$ and $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{3} + 2 x^{2} \cdot - 1 + 8 x \cdot x + 8 x \cdot - 1 + 8 x + 8 \cdot - 1)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.16.2

Multiply $- 1$ by $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{3} - 2 x^{2} + 8 x \cdot x + 8 x \cdot - 1 + 8 x + 8 \cdot - 1)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.16.3

Multiply $x$ by $x$ by adding the exponents.

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Step 2.2.8.3.27.16.3.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{3} - 2 x^{2} + 8 (x \cdot x) + 8 x \cdot - 1 + 8 x + 8 \cdot - 1)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.16.3.2

Multiply $x$ by $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{3} - 2 x^{2} + 8 x^{2} + 8 x \cdot - 1 + 8 x + 8 \cdot - 1)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.16.4

Multiply $- 1$ by $8$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{3} - 2 x^{2} + 8 x^{2} - 8 x + 8 x + 8 \cdot - 1)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.16.5

Multiply $8$ by $- 1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{3} - 2 x^{2} + 8 x^{2} - 8 x + 8 x - 8)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.17

Combine the opposite terms in $2 x^{3} - 2 x^{2} + 8 x^{2} - 8 x + 8 x - 8$ .

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Step 2.2.8.3.27.17.1

Add $- 8 x$ and $8 x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{3} - 2 x^{2} + 8 x^{2} + 0 - 8)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.17.2

Add $2 x^{3} - 2 x^{2} + 8 x^{2}$ and $0$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{3} - 2 x^{2} + 8 x^{2} - 8)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.27.18

Add $- 2 x^{2}$ and $8 x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (2 x^{3} - 6 x + 4 + 2 x^{3} + 6 x^{2} - 8)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.28

Add $2 x^{3}$ and $2 x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (4 x^{3} - 6 x + 4 + 6 x^{2} - 8)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.29

Subtract $8$ from $4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + (- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (4 x^{3} - 6 x + 6 x^{2} - 4)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.30

Expand $(- x^{4} - 2 x^{3} + 12 x^{2} - 14 x + 5) (4 x^{3} - 6 x + 6 x^{2} - 4)$ by multiplying each term in the first expression by each term in the second expression.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - x^{4} (4 x^{3}) - x^{4} (- 6 x) - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31

Simplify each term.

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Step 2.2.8.3.31.1

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 1 \cdot (4 x^{4} x^{3}) - x^{4} (- 6 x) - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.2

Multiply $x^{4}$ by $x^{3}$ by adding the exponents.

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Step 2.2.8.3.31.2.1

Move $x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 1 \cdot (4 (x^{3} x^{4})) - x^{4} (- 6 x) - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 1 \cdot (4 x^{3 + 4}) - x^{4} (- 6 x) - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.2.3

Add $3$ and $4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 1 \cdot (4 x^{7}) - x^{4} (- 6 x) - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.3

Multiply $- 1$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} - x^{4} (- 6 x) - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.4

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} - 1 \cdot (- 6 x^{4} x) - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.5

Multiply $x^{4}$ by $x$ by adding the exponents.

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Step 2.2.8.3.31.5.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} - 1 \cdot (- 6 (x \cdot x^{4})) - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.5.2

Multiply $x$ by $x^{4}$ .

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Step 2.2.8.3.31.5.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.31.5.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} - 1 \cdot (- 6 x^{1 + 4}) - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.5.3

Add $1$ and $4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} - 1 \cdot (- 6 x^{5}) - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.6

Multiply $- 1$ by $- 6$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - x^{4} (6 x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.7

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 1 \cdot (6 x^{4} x^{2}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.8

Multiply $x^{4}$ by $x^{2}$ by adding the exponents.

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Step 2.2.8.3.31.8.1

Move $x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 1 \cdot (6 (x^{2} x^{4})) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.8.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 1 \cdot (6 x^{2 + 4}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.8.3

Add $2$ and $4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 1 \cdot (6 x^{6}) - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.9

Multiply $- 1$ by $6$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} - x^{4} \cdot - 4 - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.10

Multiply $- 4$ by $- 1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 2 x^{3} (4 x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.11

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 2 \cdot (4 x^{3} x^{3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.12

Multiply $x^{3}$ by $x^{3}$ by adding the exponents.

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Step 2.2.8.3.31.12.1

Move $x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 2 \cdot (4 (x^{3} x^{3})) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.12.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 2 \cdot (4 x^{3 + 3}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.12.3

Add $3$ and $3$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 2 \cdot (4 x^{6}) - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.13

Multiply $- 2$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} - 2 x^{3} (- 6 x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.14

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} - 2 \cdot (- 6 x^{3} x) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.15

Multiply $x^{3}$ by $x$ by adding the exponents.

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Step 2.2.8.3.31.15.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} - 2 \cdot (- 6 (x \cdot x^{3})) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.15.2

Multiply $x$ by $x^{3}$ .

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Step 2.2.8.3.31.15.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.31.15.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} - 2 \cdot (- 6 x^{1 + 3}) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.15.3

Add $1$ and $3$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} - 2 \cdot (- 6 x^{4}) - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.16

Multiply $- 2$ by $- 6$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 2 x^{3} (6 x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.17

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 2 \cdot (6 x^{3} x^{2}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.18

Multiply $x^{3}$ by $x^{2}$ by adding the exponents.

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Step 2.2.8.3.31.18.1

Move $x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 2 \cdot (6 (x^{2} x^{3})) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.18.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 2 \cdot (6 x^{2 + 3}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.18.3

Add $2$ and $3$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 2 \cdot (6 x^{5}) - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.19

Multiply $- 2$ by $6$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} - 2 x^{3} \cdot - 4 + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.20

Multiply $- 4$ by $- 2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 12 x^{2} (4 x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.21

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 12 \cdot (4 x^{2} x^{3}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.22

Multiply $x^{2}$ by $x^{3}$ by adding the exponents.

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Step 2.2.8.3.31.22.1

Move $x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 12 \cdot (4 (x^{3} x^{2})) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.22.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 12 \cdot (4 x^{3 + 2}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.22.3

Add $3$ and $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 12 \cdot (4 x^{5}) + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.23

Multiply $12$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} + 12 x^{2} (- 6 x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.24

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} + 12 \cdot (- 6 x^{2} x) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.25

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 2.2.8.3.31.25.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} + 12 \cdot (- 6 (x \cdot x^{2})) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.25.2

Multiply $x$ by $x^{2}$ .

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Step 2.2.8.3.31.25.2.1

Raise $x$ to the power of $1$ .

Step 2.2.8.3.31.25.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} + 12 \cdot (- 6 x^{1 + 2}) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.25.3

Add $1$ and $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} + 12 \cdot (- 6 x^{3}) + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.26

Multiply $12$ by $- 6$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 12 x^{2} (6 x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.27

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 12 \cdot (6 x^{2} x^{2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.28

Multiply $x^{2}$ by $x^{2}$ by adding the exponents.

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Step 2.2.8.3.31.28.1

Move $x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 12 \cdot (6 (x^{2} x^{2})) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.28.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 12 \cdot (6 x^{2 + 2}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.28.3

Add $2$ and $2$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 12 \cdot (6 x^{4}) + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.29

Multiply $12$ by $6$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} + 12 x^{2} \cdot - 4 - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.30

Multiply $- 4$ by $12$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 14 x (4 x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.31

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 14 \cdot (4 x \cdot x^{3}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.32

Multiply $x$ by $x^{3}$ by adding the exponents.

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Step 2.2.8.3.31.32.1

Move $x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 14 \cdot (4 (x^{3} x)) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.32.2

Multiply $x^{3}$ by $x$ .

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Step 2.2.8.3.31.32.2.1

Raise $x$ to the power of $1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 14 \cdot (4 (x^{3} x)) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.32.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 14 \cdot (4 x^{3 + 1}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.32.3

Add $3$ and $1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 14 \cdot (4 x^{4}) - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.33

Multiply $- 14$ by $4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} - 14 x (- 6 x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.34

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} - 14 \cdot (- 6 x \cdot x) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.35

Multiply $x$ by $x$ by adding the exponents.

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Step 2.2.8.3.31.35.1

Move $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} - 14 \cdot (- 6 (x \cdot x)) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.35.2

Multiply $x$ by $x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} - 14 \cdot (- 6 x^{2}) - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.36

Multiply $- 14$ by $- 6$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 14 x (6 x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.37

Rewrite using the commutative property of multiplication.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 14 \cdot (6 x \cdot x^{2}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.38

Multiply $x$ by $x^{2}$ by adding the exponents.

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Step 2.2.8.3.31.38.1

Move $x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 14 \cdot (6 (x^{2} x)) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.38.2

Multiply $x^{2}$ by $x$ .

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Step 2.2.8.3.31.38.2.1

Raise $x$ to the power of $1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 14 \cdot (6 (x^{2} x)) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.38.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 14 \cdot (6 x^{2 + 1}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.38.3

Add $2$ and $1$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 14 \cdot (6 x^{3}) - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.39

Multiply $- 14$ by $6$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} - 14 x \cdot - 4 + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.40

Multiply $- 4$ by $- 14$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} + 56 x + 5 (4 x^{3}) + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.41

Multiply $4$ by $5$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} + 5 (- 6 x) + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.42

Multiply $- 6$ by $5$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} - 30 x + 5 (6 x^{2}) + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.43

Multiply $6$ by $5$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} - 30 x + 30 x^{2} + 5 \cdot - 4}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.31.44

Multiply $5$ by $- 4$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} - 12 x^{5} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.32

Subtract $12 x^{5}$ from $6 x^{5}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} - 6 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} + 8 x^{3} + 48 x^{5} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.33

Add $- 6 x^{5}$ and $48 x^{5}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 6 x^{6} + 4 x^{4} - 8 x^{6} + 12 x^{4} + 8 x^{3} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.34

Subtract $8 x^{6}$ from $- 6 x^{6}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 14 x^{6} + 4 x^{4} + 12 x^{4} + 8 x^{3} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.35

Add $4 x^{4}$ and $12 x^{4}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 14 x^{6} + 16 x^{4} + 8 x^{3} - 72 x^{3} + 72 x^{4} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.36

Add $16 x^{4}$ and $72 x^{4}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 14 x^{6} + 88 x^{4} + 8 x^{3} - 72 x^{3} - 48 x^{2} - 56 x^{4} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.37

Subtract $56 x^{4}$ from $88 x^{4}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 14 x^{6} + 32 x^{4} + 8 x^{3} - 72 x^{3} - 48 x^{2} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.38

Subtract $72 x^{3}$ from $8 x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 14 x^{6} + 32 x^{4} - 64 x^{3} - 48 x^{2} + 84 x^{2} - 84 x^{3} + 56 x + 20 x^{3} - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.39

Subtract $84 x^{3}$ from $- 64 x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 14 x^{6} + 32 x^{4} - 148 x^{3} - 48 x^{2} + 84 x^{2} + 56 x + 20 x^{3} - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.40

Add $- 148 x^{3}$ and $20 x^{3}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 14 x^{6} + 32 x^{4} - 128 x^{3} - 48 x^{2} + 84 x^{2} + 56 x - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.41

Add $- 48 x^{2}$ and $84 x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 14 x^{6} + 32 x^{4} - 128 x^{3} + 36 x^{2} + 56 x - 30 x + 30 x^{2} - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.42

Add $36 x^{2}$ and $30 x^{2}$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 14 x^{6} + 32 x^{4} - 128 x^{3} + 66 x^{2} + 56 x - 30 x - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.43

Subtract $30 x$ from $56 x$ .

$f'' (x) = \frac{4 x^{7} + 14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 4 x^{7} + 42 x^{5} - 14 x^{6} + 32 x^{4} - 128 x^{3} + 66 x^{2} + 26 x - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.44

Subtract $4 x^{7}$ from $4 x^{7}$ .

$f'' (x) = \frac{14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + 0 + 42 x^{5} - 14 x^{6} + 32 x^{4} - 128 x^{3} + 66 x^{2} + 26 x - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.45

Add $14 x^{6}$ and $0$ .

$f'' (x) = \frac{14 x^{6} - 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + 42 x^{5} - 14 x^{6} + 32 x^{4} - 128 x^{3} + 66 x^{2} + 26 x - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.46

Subtract $14 x^{6}$ from $14 x^{6}$ .

$f'' (x) = \frac{- 24 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + 42 x^{5} + 0 + 32 x^{4} - 128 x^{3} + 66 x^{2} + 26 x - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.47

Add $- 24 x^{5}$ and $42 x^{5}$ .

$f'' (x) = \frac{18 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + 0 + 32 x^{4} - 128 x^{3} + 66 x^{2} + 26 x - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.48

Add $18 x^{5}$ and $0$ .

$f'' (x) = \frac{18 x^{5} - 68 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 + 32 x^{4} - 128 x^{3} + 66 x^{2} + 26 x - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.49

Add $- 68 x^{4}$ and $32 x^{4}$ .

$f'' (x) = \frac{18 x^{5} - 36 x^{4} + 92 x^{3} + 78 x^{2} - 152 x + 56 - 128 x^{3} + 66 x^{2} + 26 x - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.50

Subtract $128 x^{3}$ from $92 x^{3}$ .

$f'' (x) = \frac{18 x^{5} - 36 x^{4} - 36 x^{3} + 78 x^{2} - 152 x + 56 + 66 x^{2} + 26 x - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.51

Add $78 x^{2}$ and $66 x^{2}$ .

$f'' (x) = \frac{18 x^{5} - 36 x^{4} - 36 x^{3} + 144 x^{2} - 152 x + 56 + 26 x - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.52

Add $- 152 x$ and $26 x$ .

$f'' (x) = \frac{18 x^{5} - 36 x^{4} - 36 x^{3} + 144 x^{2} - 126 x + 56 - 20}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.53

Subtract $20$ from $56$ .

$f'' (x) = \frac{18 x^{5} - 36 x^{4} - 36 x^{3} + 144 x^{2} - 126 x + 36}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54

Factor $18$ out of $18 x^{5} - 36 x^{4} - 36 x^{3} + 144 x^{2} - 126 x + 36$ .

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Step 2.2.8.3.54.1

Factor $18$ out of $18 x^{5}$ .

$f'' (x) = \frac{18 (x^{5}) - 36 x^{4} - 36 x^{3} + 144 x^{2} - 126 x + 36}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54.2

Factor $18$ out of $- 36 x^{4}$ .

$f'' (x) = \frac{18 (x^{5}) + 18 (- 2 x^{4}) - 36 x^{3} + 144 x^{2} - 126 x + 36}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54.3

Factor $18$ out of $- 36 x^{3}$ .

$f'' (x) = \frac{18 (x^{5}) + 18 (- 2 x^{4}) + 18 (- 2 x^{3}) + 144 x^{2} - 126 x + 36}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54.4

Factor $18$ out of $144 x^{2}$ .

$f'' (x) = \frac{18 (x^{5}) + 18 (- 2 x^{4}) + 18 (- 2 x^{3}) + 18 (8 x^{2}) - 126 x + 36}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54.5

Factor $18$ out of $- 126 x$ .

$f'' (x) = \frac{18 (x^{5}) + 18 (- 2 x^{4}) + 18 (- 2 x^{3}) + 18 (8 x^{2}) + 18 (- 7 x) + 36}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54.6

Factor $18$ out of $36$ .

$f'' (x) = \frac{18 x^{5} + 18 (- 2 x^{4}) + 18 (- 2 x^{3}) + 18 (8 x^{2}) + 18 (- 7 x) + 18 \cdot 2}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54.7

Factor $18$ out of $18 x^{5} + 18 (- 2 x^{4})$ .

$f'' (x) = \frac{18 (x^{5} - 2 x^{4}) + 18 (- 2 x^{3}) + 18 (8 x^{2}) + 18 (- 7 x) + 18 \cdot 2}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54.8

Factor $18$ out of $18 (x^{5} - 2 x^{4}) + 18 (- 2 x^{3})$ .

$f'' (x) = \frac{18 (x^{5} - 2 x^{4} - 2 x^{3}) + 18 (8 x^{2}) + 18 (- 7 x) + 18 \cdot 2}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54.9

Factor $18$ out of $18 (x^{5} - 2 x^{4} - 2 x^{3}) + 18 (8 x^{2})$ .

$f'' (x) = \frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2}) + 18 (- 7 x) + 18 \cdot 2}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54.10

Factor $18$ out of $18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2}) + 18 (- 7 x)$ .

$f'' (x) = \frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x) + 18 \cdot 2}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.3.54.11

Factor $18$ out of $18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x) + 18 \cdot 2$ .

$f'' (x) = \frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{({(x - 1)}^{2})}^{2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.4

Combine terms.

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Step 2.2.8.4.1

Multiply the exponents in ${({(x - 1)}^{2})}^{2}$ .

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Step 2.2.8.4.1.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f'' (x) = \frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{(x - 1)}^{2 \cdot 2} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.4.1.2

Multiply $2$ by $2$ .

$f'' (x) = \frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{(x - 1)}^{4} {({(x + 2)}^{2})}^{2}}$

Step 2.2.8.4.2

Multiply the exponents in ${({(x + 2)}^{2})}^{2}$ .

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Step 2.2.8.4.2.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$f'' (x) = \frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{(x - 1)}^{4} {(x + 2)}^{2 \cdot 2}}$

Step 2.2.8.4.2.2

Multiply $2$ by $2$ .

$f'' (x) = \frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{(x - 1)}^{4} {(x + 2)}^{4}}$

Step 2.2.8.5

Reorder terms.

$f'' (x) = \frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{(x + 2)}^{4} {(x - 1)}^{4}}$

Step 2.3

The second derivative of $f (x)$ with respect to $x$ is $\frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{(x + 2)}^{4} {(x - 1)}^{4}}$ .

$\frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{(x + 2)}^{4} {(x - 1)}^{4}}$

Step 3

Set the second derivative equal to $0$ then solve the equation $\frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{(x + 2)}^{4} {(x - 1)}^{4}} = 0$ .

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Step 3.1

Set the second derivative equal to $0$ .

$\frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{(x + 2)}^{4} {(x - 1)}^{4}} = 0$

Step 3.2

Set the numerator equal to zero.

$18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2) = 0$

Step 3.3

Solve the equation for $x$ .

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Step 3.3.1

Divide each term in $18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2) = 0$ by $18$ and simplify.

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Step 3.3.1.1

Divide each term in $18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2) = 0$ by $18$ .

$\frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{18} = \frac{0}{18}$

Step 3.3.1.2

Simplify the left side.

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Step 3.3.1.2.1

Cancel the common factor of $18$ .

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Step 3.3.1.2.1.1

Cancel the common factor.

$\frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{18} = \frac{0}{18}$

Step 3.3.1.2.1.2

Divide $x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2$ by $1$ .

$x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2 = \frac{0}{18}$

Step 3.3.1.3

Simplify the right side.

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Step 3.3.1.3.1

Divide $0$ by $18$ .

$x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2 = 0$

Step 3.3.2

Factor the left side of the equation.

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Step 3.3.2.1

Regroup terms.

$x^{5} + 8 x^{2} - 2 x^{4} - 2 x^{3} - 7 x + 2 = 0$

Step 3.3.2.2

Factor $x^{2}$ out of $x^{5} + 8 x^{2}$ .

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Step 3.3.2.2.1

Factor $x^{2}$ out of $x^{5}$ .

$x^{2} x^{3} + 8 x^{2} - 2 x^{4} - 2 x^{3} - 7 x + 2 = 0$

Step 3.3.2.2.2

Factor $x^{2}$ out of $8 x^{2}$ .

$x^{2} x^{3} + x^{2} \cdot 8 - 2 x^{4} - 2 x^{3} - 7 x + 2 = 0$

Step 3.3.2.2.3

Factor $x^{2}$ out of $x^{2} x^{3} + x^{2} \cdot 8$ .

$x^{2} (x^{3} + 8) - 2 x^{4} - 2 x^{3} - 7 x + 2 = 0$

Step 3.3.2.3

Rewrite $8$ as $2^{3}$ .

$x^{2} (x^{3} + 2^{3}) - 2 x^{4} - 2 x^{3} - 7 x + 2 = 0$

Step 3.3.2.4

Since both terms are perfect cubes, factor using the sum of cubes formula, $a^{3} + b^{3} = (a + b) (a^{2} - a b + b^{2})$ where $a = x$ and $b = 2$ .

$x^{2} ((x + 2) (x^{2} - x \cdot 2 + 2^{2})) - 2 x^{4} - 2 x^{3} - 7 x + 2 = 0$

Step 3.3.2.5

Factor.

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Step 3.3.2.5.1

Simplify.

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Step 3.3.2.5.1.1

Multiply $2$ by $- 1$ .

$x^{2} ((x + 2) (x^{2} - 2 x + 2^{2})) - 2 x^{4} - 2 x^{3} - 7 x + 2 = 0$

Step 3.3.2.5.1.2

Raise $2$ to the power of $2$ .

$x^{2} ((x + 2) (x^{2} - 2 x + 4)) - 2 x^{4} - 2 x^{3} - 7 x + 2 = 0$

Step 3.3.2.5.2

Remove unnecessary parentheses.

$x^{2} (x + 2) (x^{2} - 2 x + 4) - 2 x^{4} - 2 x^{3} - 7 x + 2 = 0$

Step 3.3.2.6

Factor $- 2 x^{4} - 2 x^{3} - 7 x + 2$ using the rational roots test.

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Step 3.3.2.6.1

If a polynomial function has integer coefficients, then every rational zero will have the form $\frac{p}{q}$ where $p$ is a factor of the constant and $q$ is a factor of the leading coefficient.

$p = \pm 1, \pm 2$

$q = \pm 1, \pm 2$

Step 3.3.2.6.2

Find every combination of $\pm \frac{p}{q}$ . These are the possible roots of the polynomial function.

$\pm 1, \pm 0.5, \pm 2$

Step 3.3.2.6.3

Substitute $- 2$ and simplify the expression. In this case, the expression is equal to $0$ so $- 2$ is a root of the polynomial.

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Step 3.3.2.6.3.1

Substitute $- 2$ into the polynomial.

$- 2 {(- 2)}^{4} - 2 {(- 2)}^{3} - 7 \cdot - 2 + 2$

Step 3.3.2.6.3.2

Raise $- 2$ to the power of $4$ .

$- 2 \cdot 16 - 2 {(- 2)}^{3} - 7 \cdot - 2 + 2$

Step 3.3.2.6.3.3

Multiply $- 2$ by $16$ .

$- 32 - 2 {(- 2)}^{3} - 7 \cdot - 2 + 2$

Step 3.3.2.6.3.4

Raise $- 2$ to the power of $3$ .

$- 32 - 2 \cdot - 8 - 7 \cdot - 2 + 2$

Step 3.3.2.6.3.5

Multiply $- 2$ by $- 8$ .

$- 32 + 16 - 7 \cdot - 2 + 2$

Step 3.3.2.6.3.6

Add $- 32$ and $16$ .

$- 16 - 7 \cdot - 2 + 2$

Step 3.3.2.6.3.7

Multiply $- 7$ by $- 2$ .

$- 16 + 14 + 2$

Step 3.3.2.6.3.8

Add $- 16$ and $14$ .

$- 2 + 2$

Step 3.3.2.6.3.9

Add $- 2$ and $2$ .

$0$

Step 3.3.2.6.4

Since $- 2$ is a known root, divide the polynomial by $x + 2$ to find the quotient polynomial. This polynomial can then be used to find the remaining roots.

$\frac{- 2 x^{4} - 2 x^{3} - 7 x + 2}{x + 2}$

Step 3.3.2.6.5

Divide $- 2 x^{4} - 2 x^{3} - 7 x + 2$ by $x + 2$ .

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Step 3.3.2.6.5.1

Set up the polynomials to be divided. If there is not a term for every exponent, insert one with a value of $0$ .

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

Step 3.3.2.6.5.2

Divide the highest order term in the dividend $- 2 x^{4}$ by the highest order term in divisor $x$ .

				-	$2 x^{3}$
	$x$	+	$2$	-	$2 x^{4}$	-	$2 x^{3}$	+	$0 x^{2}$	-	$7 x$	+	$2$

Step 3.3.2.6.5.3

Multiply the new quotient term by the divisor.

			-	$2 x^{3}$
$x$	+	$2$	-	$2 x^{4}$	-	$2 x^{3}$	+	$0 x^{2}$	-	$7 x$	+	$2$
			-	$2 x^{4}$	-	$4 x^{3}$

Step 3.3.2.6.5.4

The expression needs to be subtracted from the dividend, so change all the signs in $- 2 x^{4} - 4 x^{3}$

$2 x^{3}$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

Step 3.3.2.6.5.5

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

$2 x^{3}$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

Step 3.3.2.6.5.6

Pull the next terms from the original dividend down into the current dividend.

$2 x^{3}$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

Step 3.3.2.6.5.7

Divide the highest order term in the dividend $2 x^{3}$ by the highest order term in divisor $x$ .

$2 x^{3}$

$2 x^{2}$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

Step 3.3.2.6.5.8

Multiply the new quotient term by the divisor.

$2 x^{3}$

$2 x^{2}$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

Step 3.3.2.6.5.9

The expression needs to be subtracted from the dividend, so change all the signs in $2 x^{3} + 4 x^{2}$

$2 x^{3}$

$2 x^{2}$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

Step 3.3.2.6.5.10

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

$2 x^{3}$

$2 x^{2}$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

Step 3.3.2.6.5.11

Pull the next terms from the original dividend down into the current dividend.

$2 x^{3}$

$2 x^{2}$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

$7 x$

Step 3.3.2.6.5.12

Divide the highest order term in the dividend $- 4 x^{2}$ by the highest order term in divisor $x$ .

$2 x^{3}$

$2 x^{2}$

$4 x$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

$7 x$

Step 3.3.2.6.5.13

Multiply the new quotient term by the divisor.

$2 x^{3}$

$2 x^{2}$

$4 x$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

$7 x$

$4 x^{2}$

$8 x$

Step 3.3.2.6.5.14

The expression needs to be subtracted from the dividend, so change all the signs in $- 4 x^{2} - 8 x$

$2 x^{3}$

$2 x^{2}$

$4 x$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

$7 x$

$4 x^{2}$

$8 x$

Step 3.3.2.6.5.15

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

$2 x^{3}$

$2 x^{2}$

$4 x$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

$7 x$

$4 x^{2}$

$8 x$

$x$

Step 3.3.2.6.5.16

Pull the next terms from the original dividend down into the current dividend.

$2 x^{3}$

$2 x^{2}$

$4 x$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

$7 x$

$4 x^{2}$

$8 x$

$x$

$2$

Step 3.3.2.6.5.17

Divide the highest order term in the dividend $x$ by the highest order term in divisor $x$ .

$2 x^{3}$

$2 x^{2}$

$4 x$

$1$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

$7 x$

$4 x^{2}$

$8 x$

$x$

$2$

Step 3.3.2.6.5.18

Multiply the new quotient term by the divisor.

$2 x^{3}$

$2 x^{2}$

$4 x$

$1$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

$7 x$

$4 x^{2}$

$8 x$

$x$

$2$

$x$

$2$

Step 3.3.2.6.5.19

The expression needs to be subtracted from the dividend, so change all the signs in $x + 2$

$2 x^{3}$

$2 x^{2}$

$4 x$

$1$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

$7 x$

$4 x^{2}$

$8 x$

$x$

$2$

$x$

$2$

Step 3.3.2.6.5.20

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

$2 x^{3}$

$2 x^{2}$

$4 x$

$1$

$x$

$2$

$2 x^{4}$

$2 x^{3}$

$0 x^{2}$

$7 x$

$2$

$2 x^{4}$

$4 x^{3}$

$2 x^{3}$

$0 x^{2}$

$2 x^{3}$

$4 x^{2}$

$7 x$

$4 x^{2}$

$8 x$

$x$

$2$

$x$

$2$

$0$

Step 3.3.2.6.5.21

Since the remander is $0$ , the final answer is the quotient.

$- 2 x^{3} + 2 x^{2} - 4 x + 1$

Step 3.3.2.6.6

Write $- 2 x^{4} - 2 x^{3} - 7 x + 2$ as a set of factors.

$x^{2} (x + 2) (x^{2} - 2 x + 4) + (x + 2) (- 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.7

Factor $x + 2$ out of $x^{2} (x + 2) (x^{2} - 2 x + 4) + (x + 2) (- 2 x^{3} + 2 x^{2} - 4 x + 1)$ .

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Step 3.3.2.7.1

Factor $x + 2$ out of $x^{2} (x + 2) (x^{2} - 2 x + 4)$ .

$(x + 2) (x^{2} (x^{2} - 2 x + 4)) + (x + 2) (- 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.7.2

Factor $x + 2$ out of $(x + 2) (x^{2} (x^{2} - 2 x + 4)) + (x + 2) (- 2 x^{3} + 2 x^{2} - 4 x + 1)$ .

$(x + 2) (x^{2} (x^{2} - 2 x + 4) - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.8

Apply the distributive property.

$(x + 2) (x^{2} x^{2} + x^{2} (- 2 x) + x^{2} \cdot 4 - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.9

Simplify.

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Step 3.3.2.9.1

Multiply $x^{2}$ by $x^{2}$ by adding the exponents.

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Step 3.3.2.9.1.1

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(x + 2) (x^{2 + 2} + x^{2} (- 2 x) + x^{2} \cdot 4 - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.9.1.2

Add $2$ and $2$ .

$(x + 2) (x^{4} + x^{2} (- 2 x) + x^{2} \cdot 4 - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.9.2

Rewrite using the commutative property of multiplication.

$(x + 2) (x^{4} - 2 x^{2} x + x^{2} \cdot 4 - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.9.3

Move $4$ to the left of $x^{2}$ .

$(x + 2) (x^{4} - 2 x^{2} x + 4 \cdot x^{2} - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.10

Multiply $x^{2}$ by $x$ by adding the exponents.

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Step 3.3.2.10.1

Move $x$ .

$(x + 2) (x^{4} - 2 (x \cdot x^{2}) + 4 \cdot x^{2} - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.10.2

Multiply $x$ by $x^{2}$ .

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Step 3.3.2.10.2.1

Raise $x$ to the power of $1$ .

$(x + 2) (x^{4} - 2 (x \cdot x^{2}) + 4 \cdot x^{2} - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.10.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$(x + 2) (x^{4} - 2 x^{1 + 2} + 4 \cdot x^{2} - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.10.3

Add $1$ and $2$ .

$(x + 2) (x^{4} - 2 x^{3} + 4 \cdot x^{2} - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

$(x + 2) (x^{4} - 2 x^{3} + 4 x^{2} - 2 x^{3} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.11

Subtract $2 x^{3}$ from $- 2 x^{3}$ .

$(x + 2) (x^{4} - 4 x^{3} + 4 x^{2} + 2 x^{2} - 4 x + 1) = 0$

Step 3.3.2.12

Add $4 x^{2}$ and $2 x^{2}$ .

$(x + 2) (x^{4} - 4 x^{3} + 6 x^{2} - 4 x + 1) = 0$

Step 3.3.2.13

Factor $x^{4} - 4 x^{3} + 6 x^{2} - 4 x + 1$ using the binomial theorem.

$(x + 2) {(1 - x)}^{4} = 0$

Step 3.3.3

If any individual factor on the left side of the equation is equal to $0$ , the entire expression will be equal to $0$ .

$x + 2 = 0$

${(1 - x)}^{4} = 0$

Step 3.3.4

Set $x + 2$ equal to $0$ and solve for $x$ .

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Step 3.3.4.1

Set $x + 2$ equal to $0$ .

$x + 2 = 0$

Step 3.3.4.2

Subtract $2$ from both sides of the equation.

$x = - 2$

Step 3.3.5

Set ${(1 - x)}^{4}$ equal to $0$ and solve for $x$ .

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Step 3.3.5.1

Set ${(1 - x)}^{4}$ equal to $0$ .

${(1 - x)}^{4} = 0$

Step 3.3.5.2

Solve ${(1 - x)}^{4} = 0$ for $x$ .

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Step 3.3.5.2.1

Set the $1 - x$ equal to $0$ .

$1 - x = 0$

Step 3.3.5.2.2

Solve for $x$ .

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Step 3.3.5.2.2.1

Subtract $1$ from both sides of the equation.

$- x = - 1$

Step 3.3.5.2.2.2

Divide each term in $- x = - 1$ by $- 1$ and simplify.

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Step 3.3.5.2.2.2.1

Divide each term in $- x = - 1$ by $- 1$ .

$\frac{- x}{- 1} = \frac{- 1}{- 1}$

Step 3.3.5.2.2.2.2

Simplify the left side.

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Step 3.3.5.2.2.2.2.1

Dividing two negative values results in a positive value.

$\frac{x}{1} = \frac{- 1}{- 1}$

Step 3.3.5.2.2.2.2.2

Divide $x$ by $1$ .

$x = \frac{- 1}{- 1}$

Step 3.3.5.2.2.2.3

Simplify the right side.

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Step 3.3.5.2.2.2.3.1

Divide $- 1$ by $- 1$ .

$x = 1$

Step 3.3.6

The final solution is all the values that make $(x + 2) {(1 - x)}^{4} = 0$ true.

$x = - 2, 1$

Step 3.4

Exclude the solutions that do not make $\frac{18 (x^{5} - 2 x^{4} - 2 x^{3} + 8 x^{2} - 7 x + 2)}{{(x + 2)}^{4} {(x - 1)}^{4}} = 0$ true.

$No solution$

Step 4

No values found that can make the second derivative equal to $0$ .

No Inflection Points