$\"\"$

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The integral is $\"\"$ .

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Assume $\"\"$ .

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Differentiate on each side with respect to $\"\"$ .

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$\"\"$

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$\"\"$ .

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If $\"\"$ , then $\"\"$ .

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If $\"\"$ , then $\"\"$ .

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Substitute $\"\"$ , $\"\"$ and change of the limits.

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$\"\"$

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$\"\"$ .

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$\"\"$

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Part 2 of the fundamental theorem of calculus :

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If $\"\"$ is continuous on $\"\"$ , $\"\"$ .

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Where $\"\"$ is any anti derivative of $\"\"$ , that is a function such that $\"\"$ .

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Anti derivative of the function $\"\"$ is $\"\"$ .

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$\"\"$

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$\"\"$ .

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. $\"\"$

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$\"\"$ .