$\"\"$

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The integral is $\"\"$ .

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Consider $\"\"$ .

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Apply derivative on each side.

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$\"\"$

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$\"\"$

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Change of integral limits:

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Lower limit: If $\"\"$ then $\"\"$ .

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Upper limit: If $\"\"$ then $\"\"$ .

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

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ . $\"\"$

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$\"\"$ .