Calculus Examples

$y = \sin (x^{2} e^{x})$

Step 1

Find the first derivative.

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Step 1.1

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

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Step 1.1.1

To apply the Chain Rule, set $u$ as $x^{2} e^{x}$ .

$\frac{d}{d u} [\sin (u)] \frac{d}{d x} [x^{2} e^{x}]$

Step 1.1.2

The derivative of $\sin (u)$ with respect to $u$ is $\cos (u)$ .

$\cos (u) \frac{d}{d x} [x^{2} e^{x}]$

Step 1.1.3

Replace all occurrences of $u$ with $x^{2} e^{x}$ .

$\cos (x^{2} e^{x}) \frac{d}{d x} [x^{2} e^{x}]$

Step 1.2

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 $f (x) = x^{2}$ and $g (x) = e^{x}$ .

$\cos (x^{2} e^{x}) (x^{2} \frac{d}{d x} [e^{x}] + e^{x} \frac{d}{d x} [x^{2}])$

Step 1.3

Differentiate using the Exponential Rule which states that $\frac{d}{d x} [a^{x}]$ is $a^{x} \ln (a)$ where $a$ = $e$ .

$\cos (x^{2} e^{x}) (x^{2} e^{x} + e^{x} \frac{d}{d x} [x^{2}])$

Step 1.4

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

$\cos (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))$

Step 1.5

Simplify.

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Step 1.5.1

Apply the distributive property.

$\cos (x^{2} e^{x}) (x^{2} e^{x}) + \cos (x^{2} e^{x}) (e^{x} (2 x))$

Step 1.5.2

Reorder terms.

$f' (x) = e^{x} x^{2} \cos (x^{2} e^{x}) + 2 e^{x} x \cos (x^{2} e^{x})$

Step 2

Find the second derivative.

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Step 2.1

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

$\frac{d}{d x} [e^{x} x^{2} \cos (x^{2} e^{x})] + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

Step 2.2

Evaluate $\frac{d}{d x} [e^{x} x^{2} \cos (x^{2} e^{x})]$ .

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Step 2.2.1

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 $f (x) = e^{x} x^{2}$ and $g (x) = \cos (x^{2} e^{x})$ .

$e^{x} x^{2} \frac{d}{d x} [\cos (x^{2} e^{x})] + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x^{2}] + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

Step 2.2.2

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

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Step 2.2.2.1

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

$e^{x} x^{2} (\frac{d}{d u_{1}} [\cos (u_{1})] \frac{d}{d x} [x^{2} e^{x}]) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x^{2}] + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

Step 2.2.2.2

The derivative of $\cos (u_{1})$ with respect to $u_{1}$ is $- \sin (u_{1})$ .

$e^{x} x^{2} (- \sin (u_{1}) \frac{d}{d x} [x^{2} e^{x}]) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x^{2}] + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

Step 2.2.2.3

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

$e^{x} x^{2} (- \sin (x^{2} e^{x}) \frac{d}{d x} [x^{2} e^{x}]) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x^{2}] + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

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 $f (x) = x^{2}$ and $g (x) = e^{x}$ .

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} \frac{d}{d x} [e^{x}] + e^{x} \frac{d}{d x} [x^{2}])) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x^{2}] + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

Step 2.2.4

Differentiate using the Exponential Rule which states that $\frac{d}{d x} [a^{x}]$ is $a^{x} \ln (a)$ where $a$ = $e$ .

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} \frac{d}{d x} [x^{2}])) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x^{2}] + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

Step 2.2.5

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

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x^{2}] + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

Step 2.2.6

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 $f (x) = e^{x}$ and $g (x) = x^{2}$ .

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} \frac{d}{d x} [x^{2}] + x^{2} \frac{d}{d x} [e^{x}]) + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

Step 2.2.7

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

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} \frac{d}{d x} [e^{x}]) + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

Step 2.2.8

Differentiate using the Exponential Rule which states that $\frac{d}{d x} [a^{x}]$ is $a^{x} \ln (a)$ where $a$ = $e$ .

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + \frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$

Step 2.3

Evaluate $\frac{d}{d x} [2 e^{x} x \cos (x^{2} e^{x})]$ .

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Step 2.3.1

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

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + 2 \frac{d}{d x} [e^{x} x \cos (x^{2} e^{x})]$

Step 2.3.2

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 $f (x) = e^{x} x$ and $g (x) = \cos (x^{2} e^{x})$ .

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + 2 (e^{x} x \frac{d}{d x} [\cos (x^{2} e^{x})] + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x])$

Step 2.3.3

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

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Step 2.3.3.1

To apply the Chain Rule, set $u_{2}$ as $x^{2} e^{x}$ .

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + 2 (e^{x} x (\frac{d}{d u_{2}} [\cos (u_{2})] \frac{d}{d x} [x^{2} e^{x}]) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x])$

Step 2.3.3.2

The derivative of $\cos (u_{2})$ with respect to $u_{2}$ is $- \sin (u_{2})$ .

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + 2 (e^{x} x (- \sin (u_{2}) \frac{d}{d x} [x^{2} e^{x}]) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x])$

Step 2.3.3.3

Replace all occurrences of $u_{2}$ with $x^{2} e^{x}$ .

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) \frac{d}{d x} [x^{2} e^{x}]) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x])$

Step 2.3.4

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 $f (x) = x^{2}$ and $g (x) = e^{x}$ .

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} \frac{d}{d x} [e^{x}] + e^{x} \frac{d}{d x} [x^{2}])) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x])$

Step 2.3.5

Differentiate using the Exponential Rule which states that $\frac{d}{d x} [a^{x}]$ is $a^{x} \ln (a)$ where $a$ = $e$ .

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} \frac{d}{d x} [x^{2}])) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x])$

Step 2.3.6

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

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) \frac{d}{d x} [e^{x} x])$

Step 2.3.7

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 $f (x) = e^{x}$ and $g (x) = x$ .

Step 2.3.8

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

Step 2.3.9

Differentiate using the Exponential Rule which states that $\frac{d}{d x} [a^{x}]$ is $a^{x} \ln (a)$ where $a$ = $e$ .

Step 2.3.10

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

Step 2.4

Simplify.

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Step 2.4.1

Apply the distributive property.

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x}) - \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} + x e^{x}))$

Step 2.4.2

Apply the distributive property.

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x) + x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} + x e^{x}))$

Step 2.4.3

Apply the distributive property.

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x} + e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} + x e^{x}))$

Step 2.4.4

Apply the distributive property.

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}) - \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} + x e^{x}))$

Step 2.4.5

Apply the distributive property.

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x})) + e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} + x e^{x}))$

Step 2.4.6

Apply the distributive property.

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x})) + e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) e^{x} + \cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.7

Apply the distributive property.

$e^{x} x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8

Combine terms.

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Step 2.4.8.1

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

$x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{x + x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.2

Add $x$ and $x$ .

$x^{2} (- \sin (x^{2} e^{x}) (x^{2} e^{2 x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.3

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

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Step 2.4.8.3.1

Move $x^{2}$ .

$x^{2} x^{2} (- \sin (x^{2} e^{x}) (e^{2 x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.3.2

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

$x^{2 + 2} (- \sin (x^{2} e^{x}) (e^{2 x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.3.3

Add $2$ and $2$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + e^{x} x^{2} (- \sin (x^{2} e^{x}) (e^{x} (2 x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.4

Multiply $2$ by $- 1$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + e^{x} x^{2} (- 2 \sin (x^{2} e^{x}) (e^{x} (x))) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.5

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

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{2} (- 2 \sin (x^{2} e^{x}) (e^{x + x} x)) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.6

Add $x$ and $x$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{2} (- 2 \sin (x^{2} e^{x}) (e^{2 x} x)) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.7

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

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Step 2.4.8.7.1

Move $x$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x \cdot x^{2} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.7.2

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

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Step 2.4.8.7.2.1

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

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{1} x^{2} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.7.2.2

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

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{1 + 2} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.7.3

Add $1$ and $2$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (x^{2} e^{x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.8

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

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (x (- \sin (x^{2} e^{x}) (x^{2} e^{x + x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.9

Add $x$ and $x$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (x (- \sin (x^{2} e^{x}) (x^{2} e^{2 x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.10

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

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (x^{2} x^{1} (- \sin (x^{2} e^{x}) (e^{2 x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.11

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

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (x^{2 + 1} (- \sin (x^{2} e^{x}) (e^{2 x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.12

Add $2$ and $1$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) + 2 (x^{3} (- \sin (x^{2} e^{x}) (e^{2 x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.13

Multiply $- 1$ by $2$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 2 (x^{3} (\sin (x^{2} e^{x}) (e^{2 x}))) + 2 (e^{x} x (- \sin (x^{2} e^{x}) (e^{x} (2 x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.14

Multiply $2$ by $- 1$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 2 x^{3} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 (e^{x} x (- 2 \sin (x^{2} e^{x}) (e^{x} (x)))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.15

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

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 2 x^{3} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 (x (- 2 \sin (x^{2} e^{x}) (e^{x + x} x))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.16

Add $x$ and $x$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 2 x^{3} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 (x (- 2 \sin (x^{2} e^{x}) (e^{2 x} x))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.17

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

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 2 x^{3} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 (x^{1} x (- 2 \sin (x^{2} e^{x}) (e^{2 x}))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.18

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

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 2 x^{3} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 (x^{1} x^{1} (- 2 \sin (x^{2} e^{x}) (e^{2 x}))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.19

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

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 2 x^{3} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 (x^{1 + 1} (- 2 \sin (x^{2} e^{x}) (e^{2 x}))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.20

Add $1$ and $1$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 2 x^{3} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 (x^{2} (- 2 \sin (x^{2} e^{x}) (e^{2 x}))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.21

Multiply $- 2$ by $2$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) + x^{3} (- 2 \sin (x^{2} e^{x}) (e^{2 x})) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 2 x^{3} (\sin (x^{2} e^{x}) (e^{2 x})) - 4 (x^{2} (\sin (x^{2} e^{x}) (e^{2 x}))) + 2 (\cos (x^{2} e^{x}) e^{x}) + 2 (\cos (x^{2} e^{x}) (x e^{x}))$

Step 2.4.8.22

Move $\sin (x^{2} e^{x})$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) - 2 \cdot x^{3} e^{2 x} \sin (x^{2} e^{x}) - 2 x^{3} e^{2 x} \sin (x^{2} e^{x}) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 4 x^{2} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 \cos (x^{2} e^{x}) e^{x} + 2 \cos (x^{2} e^{x}) (x e^{x})$

Step 2.4.8.23

Subtract $2 x^{3} e^{2 x} \sin (x^{2} e^{x})$ from $- 2 x^{3} e^{2 x} \sin (x^{2} e^{x})$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) - 4 x^{3} e^{2 x} \sin (x^{2} e^{x}) + \cos (x^{2} e^{x}) (e^{x} (2 x)) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 4 x^{2} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 \cos (x^{2} e^{x}) e^{x} + 2 \cos (x^{2} e^{x}) (x e^{x})$

Step 2.4.8.24

Move $\cos (x^{2} e^{x})$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) - 4 x^{3} e^{2 x} \sin (x^{2} e^{x}) + 2 x e^{x} \cos (x^{2} e^{x}) + 2 x e^{x} \cos (x^{2} e^{x}) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 4 x^{2} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 \cos (x^{2} e^{x}) e^{x}$

Step 2.4.8.25

Add $2 x e^{x} \cos (x^{2} e^{x})$ and $2 x e^{x} \cos (x^{2} e^{x})$ .

$x^{4} (- \sin (x^{2} e^{x}) (e^{2 x})) - 4 x^{3} e^{2 x} \sin (x^{2} e^{x}) + 4 x e^{x} \cos (x^{2} e^{x}) + \cos (x^{2} e^{x}) (x^{2} e^{x}) - 4 x^{2} (\sin (x^{2} e^{x}) (e^{2 x})) + 2 \cos (x^{2} e^{x}) e^{x}$

Step 2.4.9

Reorder terms.

$- e^{2 x} x^{4} \sin (x^{2} e^{x}) - 4 e^{2 x} x^{3} \sin (x^{2} e^{x}) + 4 e^{x} x \cos (x^{2} e^{x}) + e^{x} x^{2} \cos (x^{2} e^{x}) - 4 e^{2 x} x^{2} \sin (x^{2} e^{x}) + 2 e^{x} \cos (x^{2} e^{x})$

Step 2.4.10

Reorder factors in $- e^{2 x} x^{4} \sin (x^{2} e^{x}) - 4 e^{2 x} x^{3} \sin (x^{2} e^{x}) + 4 e^{x} x \cos (x^{2} e^{x}) + e^{x} x^{2} \cos (x^{2} e^{x}) - 4 e^{2 x} x^{2} \sin (x^{2} e^{x}) + 2 e^{x} \cos (x^{2} e^{x})$ .

$f'' (x) = - x^{4} e^{2 x} \sin (x^{2} e^{x}) - 4 x^{3} e^{2 x} \sin (x^{2} e^{x}) + 4 x e^{x} \cos (x^{2} e^{x}) + x^{2} e^{x} \cos (x^{2} e^{x}) - 4 x^{2} e^{2 x} \sin (x^{2} e^{x}) + 2 e^{x} \cos (x^{2} e^{x})$