$\"\"$

\

The integral is $\"\"$ .

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Apply integral reduction : $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Consider $\"\"$ .

\

Again apply integral reduction : $\"\"$ .

\

$\"\"$

\

Thus, $\"\"$ .

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$\"\"$

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Substitute $\"\"$ in equation (1).

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$\"\"$

\

$\"\"$

\

$\"\"$ .