$\"\"$

\

The integral is $\"\"$ .

\

Let $\"\"$ , then $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ in $\"\"$ .

\

$\"\"$ .

\

Apply formula : $\"\"$ .

\

$\"\"$ .

\

Substitute back $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

$\"\"$ .