Calculus Examples

$f (x) = \ln (\frac{x^{3} - 7}{\sqrt[3]{x}})$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt[3]{x}$ as $x^{\frac{1}{3}}$ .

$\frac{d}{d x} [\ln (\frac{x^{3} - 7}{x^{\frac{1}{3}}})]$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = \ln (x)$ and $g (x) = \frac{x^{3} - 7}{x^{\frac{1}{3}}}$ .

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Step 2.1

To apply the Chain Rule, set $u$ as $\frac{x^{3} - 7}{x^{\frac{1}{3}}}$ .

$\frac{d}{d u} [\ln (u)] \frac{d}{d x} [\frac{x^{3} - 7}{x^{\frac{1}{3}}}]$

Step 2.2

The derivative of $\ln (u)$ with respect to $u$ is $\frac{1}{u}$ .

$\frac{1}{u} \frac{d}{d x} [\frac{x^{3} - 7}{x^{\frac{1}{3}}}]$

Step 2.3

Replace all occurrences of $u$ with $\frac{x^{3} - 7}{x^{\frac{1}{3}}}$ .

$\frac{1}{\frac{x^{3} - 7}{x^{\frac{1}{3}}}} \frac{d}{d x} [\frac{x^{3} - 7}{x^{\frac{1}{3}}}]$

Step 3

Multiply by the reciprocal of the fraction to divide by $\frac{x^{3} - 7}{x^{\frac{1}{3}}}$ .

$1 \frac{x^{\frac{1}{3}}}{x^{3} - 7} \frac{d}{d x} [\frac{x^{3} - 7}{x^{\frac{1}{3}}}]$

Step 4

Multiply $\frac{x^{\frac{1}{3}}}{x^{3} - 7}$ by $1$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \frac{d}{d x} [\frac{x^{3} - 7}{x^{\frac{1}{3}}}]$

Step 5

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 $f (x) = x^{3} - 7$ and $g (x) = x^{\frac{1}{3}}$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{1}{3}} \frac{d}{d x} [x^{3} - 7] - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{{(x^{\frac{1}{3}})}^{2}}$

Step 6

Differentiate.

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Step 6.1

Multiply the exponents in ${(x^{\frac{1}{3}})}^{2}$ .

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Step 6.1.1

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

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{1}{3}} \frac{d}{d x} [x^{3} - 7] - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{1}{3} \cdot 2}}$

Step 6.1.2

Combine $\frac{1}{3}$ and $2$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{1}{3}} \frac{d}{d x} [x^{3} - 7] - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 6.2

By the Sum Rule, the derivative of $x^{3} - 7$ with respect to $x$ is $\frac{d}{d x} [x^{3}] + \frac{d}{d x} [- 7]$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{1}{3}} (\frac{d}{d x} [x^{3}] + \frac{d}{d x} [- 7]) - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 6.3

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

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{1}{3}} (3 x^{2} + \frac{d}{d x} [- 7]) - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 6.4

Since $- 7$ is constant with respect to $x$ , the derivative of $- 7$ with respect to $x$ is $0$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{1}{3}} (3 x^{2} + 0) - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 6.5

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

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{1}{3}} (3 x^{2}) - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 7

Multiply $x^{\frac{1}{3}}$ by $x^{2}$ by adding the exponents.

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Step 7.1

Move $x^{2}$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{2} x^{\frac{1}{3}} \cdot 3 - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 7.2

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

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{2 + \frac{1}{3}} \cdot 3 - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 7.3

To write $2$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{2 \cdot \frac{3}{3} + \frac{1}{3}} \cdot 3 - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 7.4

Combine $2$ and $\frac{3}{3}$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{2 \cdot 3}{3} + \frac{1}{3}} \cdot 3 - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 7.5

Combine the numerators over the common denominator.

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{2 \cdot 3 + 1}{3}} \cdot 3 - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 7.6

Simplify the numerator.

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Step 7.6.1

Multiply $2$ by $3$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{6 + 1}{3}} \cdot 3 - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 7.6.2

Add $6$ and $1$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{x^{\frac{7}{3}} \cdot 3 - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 8

Move $3$ to the left of $x^{\frac{7}{3}}$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{3 \cdot x^{\frac{7}{3}} - (x^{3} - 7) \frac{d}{d x} [x^{\frac{1}{3}}]}{x^{\frac{2}{3}}}$

Step 9

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

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{3 x^{\frac{7}{3}} - (x^{3} - 7) (\frac{1}{3} x^{\frac{1}{3} - 1})}{x^{\frac{2}{3}}}$

Step 10

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{3 x^{\frac{7}{3}} - (x^{3} - 7) (\frac{1}{3} x^{\frac{1}{3} - 1 \cdot \frac{3}{3}})}{x^{\frac{2}{3}}}$

Step 11

Combine $- 1$ and $\frac{3}{3}$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{3 x^{\frac{7}{3}} - (x^{3} - 7) (\frac{1}{3} x^{\frac{1}{3} + \frac{- 1 \cdot 3}{3}})}{x^{\frac{2}{3}}}$

Step 12

Combine the numerators over the common denominator.

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{3 x^{\frac{7}{3}} - (x^{3} - 7) (\frac{1}{3} x^{\frac{1 - 1 \cdot 3}{3}})}{x^{\frac{2}{3}}}$

Step 13

Simplify the numerator.

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Step 13.1

Multiply $- 1$ by $3$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{3 x^{\frac{7}{3}} - (x^{3} - 7) (\frac{1}{3} x^{\frac{1 - 3}{3}})}{x^{\frac{2}{3}}}$

Step 13.2

Subtract $3$ from $1$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{3 x^{\frac{7}{3}} - (x^{3} - 7) (\frac{1}{3} x^{\frac{- 2}{3}})}{x^{\frac{2}{3}}}$

Step 14

Move the negative in front of the fraction.

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{3 x^{\frac{7}{3}} - (x^{3} - 7) (\frac{1}{3} x^{- \frac{2}{3}})}{x^{\frac{2}{3}}}$

Step 15

Combine $\frac{1}{3}$ and $x^{- \frac{2}{3}}$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{3 x^{\frac{7}{3}} - (x^{3} - 7) \frac{x^{- \frac{2}{3}}}{3}}{x^{\frac{2}{3}}}$

Step 16

Move $x^{- \frac{2}{3}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{x^{\frac{1}{3}}}{x^{3} - 7} \cdot \frac{3 x^{\frac{7}{3}} - (x^{3} - 7) \frac{1}{3 x^{\frac{2}{3}}}}{x^{\frac{2}{3}}}$

Step 17

Multiply $\frac{x^{\frac{1}{3}}}{x^{3} - 7}$ by $\frac{3 x^{\frac{7}{3}} - (x^{3} - 7) \frac{1}{3 x^{\frac{2}{3}}}}{x^{\frac{2}{3}}}$ .

$\frac{x^{\frac{1}{3}} (3 x^{\frac{7}{3}} - (x^{3} - 7) \frac{1}{3 x^{\frac{2}{3}}})}{(x^{3} - 7) x^{\frac{2}{3}}}$

Step 18

Move $x^{\frac{1}{3}}$ to the denominator using the negative exponent rule $b^{n} = \frac{1}{b^{- n}}$ .

$\frac{3 x^{\frac{7}{3}} - (x^{3} - 7) \frac{1}{3 x^{\frac{2}{3}}}}{(x^{3} - 7) x^{\frac{2}{3}} x^{- \frac{1}{3}}}$

Step 19

Multiply $x^{\frac{2}{3}}$ by $x^{- \frac{1}{3}}$ by adding the exponents.

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Step 19.1

Move $x^{- \frac{1}{3}}$ .

$\frac{3 x^{\frac{7}{3}} - (x^{3} - 7) \frac{1}{3 x^{\frac{2}{3}}}}{(x^{3} - 7) (x^{- \frac{1}{3}} x^{\frac{2}{3}})}$

Step 19.2

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

$\frac{3 x^{\frac{7}{3}} - (x^{3} - 7) \frac{1}{3 x^{\frac{2}{3}}}}{(x^{3} - 7) x^{- \frac{1}{3} + \frac{2}{3}}}$

Step 19.3

Combine the numerators over the common denominator.

$\frac{3 x^{\frac{7}{3}} - (x^{3} - 7) \frac{1}{3 x^{\frac{2}{3}}}}{(x^{3} - 7) x^{\frac{- 1 + 2}{3}}}$

Step 19.4

Add $- 1$ and $2$ .

$\frac{3 x^{\frac{7}{3}} - (x^{3} - 7) \frac{1}{3 x^{\frac{2}{3}}}}{(x^{3} - 7) x^{\frac{1}{3}}}$

Step 20

Simplify.

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Step 20.1

Apply the distributive property.

$\frac{3 x^{\frac{7}{3}} + (- x^{3} - - 7) \frac{1}{3 x^{\frac{2}{3}}}}{(x^{3} - 7) x^{\frac{1}{3}}}$

Step 20.2

Apply the distributive property.

$\frac{3 x^{\frac{7}{3}} - x^{3} \frac{1}{3 x^{\frac{2}{3}}} - - 7 \frac{1}{3 x^{\frac{2}{3}}}}{(x^{3} - 7) x^{\frac{1}{3}}}$

Step 20.3

Apply the distributive property.

$\frac{3 x^{\frac{7}{3}} - x^{3} \frac{1}{3 x^{\frac{2}{3}}} - - 7 \frac{1}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4

Simplify the numerator.

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Step 20.4.1

Simplify each term.

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Step 20.4.1.1

Cancel the common factor of $x^{\frac{2}{3}}$ .

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Step 20.4.1.1.1

Factor $x^{\frac{2}{3}}$ out of $- x^{3}$ .

$\frac{3 x^{\frac{7}{3}} + x^{\frac{2}{3}} (- x^{\frac{7}{3}}) \frac{1}{3 x^{\frac{2}{3}}} - - 7 \frac{1}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.1.1.2

Factor $x^{\frac{2}{3}}$ out of $3 x^{\frac{2}{3}}$ .

$\frac{3 x^{\frac{7}{3}} + x^{\frac{2}{3}} (- x^{\frac{7}{3}}) \frac{1}{x^{\frac{2}{3}} \cdot 3} - - 7 \frac{1}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.1.1.3

Cancel the common factor.

$\frac{3 x^{\frac{7}{3}} + x^{\frac{2}{3}} (- x^{\frac{7}{3}}) \frac{1}{x^{\frac{2}{3}} \cdot 3} - - 7 \frac{1}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.1.1.4

Rewrite the expression.

$\frac{3 x^{\frac{7}{3}} - x^{\frac{7}{3}} \frac{1}{3} - - 7 \frac{1}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.1.2

Combine $\frac{1}{3}$ and $x^{\frac{7}{3}}$ .

$\frac{3 x^{\frac{7}{3}} - \frac{x^{\frac{7}{3}}}{3} - - 7 \frac{1}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.1.3

Multiply $- 1$ by $- 7$ .

$\frac{3 x^{\frac{7}{3}} - \frac{x^{\frac{7}{3}}}{3} + 7 \frac{1}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.1.4

Combine $7$ and $\frac{1}{3 x^{\frac{2}{3}}}$ .

$\frac{3 x^{\frac{7}{3}} - \frac{x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.2

To write $3 x^{\frac{7}{3}}$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$\frac{3 x^{\frac{7}{3}} \cdot \frac{3}{3} - \frac{x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.3

Combine $3 x^{\frac{7}{3}}$ and $\frac{3}{3}$ .

$\frac{\frac{3 x^{\frac{7}{3}} \cdot 3}{3} - \frac{x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.4

Combine the numerators over the common denominator.

$\frac{\frac{3 x^{\frac{7}{3}} \cdot 3 - x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.5

Simplify each term.

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Step 20.4.5.1

Simplify the numerator.

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Step 20.4.5.1.1

Factor $x^{\frac{7}{3}}$ out of $3 x^{\frac{7}{3}} \cdot 3 - x^{\frac{7}{3}}$ .

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Step 20.4.5.1.1.1

Move $x^{\frac{7}{3}}$ .

$\frac{\frac{3 \cdot 3 x^{\frac{7}{3}} - x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.5.1.1.2

Factor $x^{\frac{7}{3}}$ out of $3 \cdot 3 x^{\frac{7}{3}}$ .

$\frac{\frac{x^{\frac{7}{3}} (3 \cdot 3) - x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.5.1.1.3

Factor $x^{\frac{7}{3}}$ out of $- x^{\frac{7}{3}}$ .

$\frac{\frac{x^{\frac{7}{3}} (3 \cdot 3) + x^{\frac{7}{3}} \cdot - 1}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.5.1.1.4

Factor $x^{\frac{7}{3}}$ out of $x^{\frac{7}{3}} (3 \cdot 3) + x^{\frac{7}{3}} \cdot - 1$ .

$\frac{\frac{x^{\frac{7}{3}} (3 \cdot 3 - 1)}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.5.1.2

Multiply $3$ by $3$ .

$\frac{\frac{x^{\frac{7}{3}} (9 - 1)}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.5.1.3

Subtract $1$ from $9$ .

$\frac{\frac{x^{\frac{7}{3}} \cdot 8}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.4.5.2

Move $8$ to the left of $x^{\frac{7}{3}}$ .

$\frac{\frac{8 x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3} x^{\frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.5

Combine terms.

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Step 20.5.1

Multiply $x^{3}$ by $x^{\frac{1}{3}}$ by adding the exponents.

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Step 20.5.1.1

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

$\frac{\frac{8 x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3 + \frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.5.1.2

To write $3$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$\frac{\frac{8 x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{3 \cdot \frac{3}{3} + \frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.5.1.3

Combine $3$ and $\frac{3}{3}$ .

$\frac{\frac{8 x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{\frac{3 \cdot 3}{3} + \frac{1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.5.1.4

Combine the numerators over the common denominator.

$\frac{\frac{8 x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{\frac{3 \cdot 3 + 1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.5.1.5

Simplify the numerator.

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Step 20.5.1.5.1

Multiply $3$ by $3$ .

$\frac{\frac{8 x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{\frac{9 + 1}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.5.1.5.2

Add $9$ and $1$ .

$\frac{\frac{8 x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{\frac{10}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.5.2

Multiply $\frac{\frac{8 x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{\frac{10}{3}} - 7 x^{\frac{1}{3}}}$ by $\frac{3 x^{\frac{2}{3}}}{3 x^{\frac{2}{3}}}$ .

$\frac{3 x^{\frac{2}{3}}}{3 x^{\frac{2}{3}}} \cdot \frac{\frac{8 x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}}}{x^{\frac{10}{3}} - 7 x^{\frac{1}{3}}}$

Step 20.5.3

Combine.

$\frac{3 x^{\frac{2}{3}} (\frac{8 x^{\frac{7}{3}}}{3} + \frac{7}{3 x^{\frac{2}{3}}})}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.4

Apply the distributive property.

$\frac{3 x^{\frac{2}{3}} \frac{8 x^{\frac{7}{3}}}{3} + 3 x^{\frac{2}{3}} \frac{7}{3 x^{\frac{2}{3}}}}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.5

Cancel the common factor of $3$ .

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Step 20.5.5.1

Factor $3$ out of $3 x^{\frac{2}{3}}$ .

$\frac{3 (x^{\frac{2}{3}}) \frac{8 x^{\frac{7}{3}}}{3} + 3 x^{\frac{2}{3}} \frac{7}{3 x^{\frac{2}{3}}}}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.5.2

Cancel the common factor.

$\frac{3 x^{\frac{2}{3}} \frac{8 x^{\frac{7}{3}}}{3} + 3 x^{\frac{2}{3}} \frac{7}{3 x^{\frac{2}{3}}}}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.5.3

Rewrite the expression.

$\frac{x^{\frac{2}{3}} (8 x^{\frac{7}{3}}) + 3 x^{\frac{2}{3}} \frac{7}{3 x^{\frac{2}{3}}}}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.6

Multiply $x^{\frac{2}{3}}$ by $x^{\frac{7}{3}}$ by adding the exponents.

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Step 20.5.6.1

Move $x^{\frac{7}{3}}$ .

$\frac{x^{\frac{7}{3}} x^{\frac{2}{3}} \cdot 8 + 3 x^{\frac{2}{3}} \frac{7}{3 x^{\frac{2}{3}}}}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.6.2

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

$\frac{x^{\frac{7}{3} + \frac{2}{3}} \cdot 8 + 3 x^{\frac{2}{3}} \frac{7}{3 x^{\frac{2}{3}}}}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.6.3

Combine the numerators over the common denominator.

$\frac{x^{\frac{7 + 2}{3}} \cdot 8 + 3 x^{\frac{2}{3}} \frac{7}{3 x^{\frac{2}{3}}}}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.6.4

Add $7$ and $2$ .

$\frac{x^{\frac{9}{3}} \cdot 8 + 3 x^{\frac{2}{3}} \frac{7}{3 x^{\frac{2}{3}}}}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.6.5

Divide $9$ by $3$ .

$\frac{x^{3} \cdot 8 + 3 x^{\frac{2}{3}} \frac{7}{3 x^{\frac{2}{3}}}}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.7

Cancel the common factor of $3 x^{\frac{2}{3}}$ .

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Step 20.5.7.1

Cancel the common factor.

$\frac{x^{3} \cdot 8 + 3 x^{\frac{2}{3}} \frac{7}{3 x^{\frac{2}{3}}}}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.7.2

Rewrite the expression.

$\frac{x^{3} \cdot 8 + 7}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.5.8

Move $8$ to the left of $x^{3}$ .

$\frac{8 x^{3} + 7}{3 x^{\frac{2}{3}} (x^{\frac{10}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.6

Simplify the denominator.

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Step 20.6.1

Factor $x^{\frac{1}{3}}$ out of $x^{\frac{10}{3}} - 7 x^{\frac{1}{3}}$ .

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Step 20.6.1.1

Factor $x^{\frac{1}{3}}$ out of $x^{\frac{10}{3}}$ .

$\frac{8 x^{3} + 7}{3 x^{\frac{2}{3}} (x^{\frac{1}{3}} x^{\frac{9}{3}} - 7 x^{\frac{1}{3}})}$

Step 20.6.1.2

Factor $x^{\frac{1}{3}}$ out of $- 7 x^{\frac{1}{3}}$ .

$\frac{8 x^{3} + 7}{3 x^{\frac{2}{3}} (x^{\frac{1}{3}} x^{\frac{9}{3}} + x^{\frac{1}{3}} \cdot - 7)}$

Step 20.6.1.3

Factor $x^{\frac{1}{3}}$ out of $x^{\frac{1}{3}} x^{\frac{9}{3}} + x^{\frac{1}{3}} \cdot - 7$ .

$\frac{8 x^{3} + 7}{3 x^{\frac{2}{3}} (x^{\frac{1}{3}} (x^{\frac{9}{3}} - 7))}$

Step 20.6.2

Divide $9$ by $3$ .

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

Step 20.6.3

Combine exponents.

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Step 20.6.3.1

Multiply $x^{\frac{2}{3}}$ by $x^{\frac{1}{3}}$ by adding the exponents.

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Step 20.6.3.1.1

Move $x^{\frac{1}{3}}$ .

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

Step 20.6.3.1.2

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

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

Step 20.6.3.1.3

Combine the numerators over the common denominator.

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

Step 20.6.3.1.4

Add $1$ and $2$ .

$\frac{8 x^{3} + 7}{3 x^{\frac{3}{3}} (x^{3} - 7)}$

Step 20.6.3.1.5

Divide $3$ by $3$ .

$\frac{8 x^{3} + 7}{3 x^{1} (x^{3} - 7)}$

Step 20.6.3.2

Simplify $3 x^{1}$ .

$\frac{8 x^{3} + 7}{3 x (x^{3} - 7)}$