$\"\"$

\

The functions are $\"\"$ and $\"\"$ .

\

Find $\"\"$ .

\

$\"\"$ (Composition of functions formula)

\

$\"\"$ (Substitute $\"\"$ )

\

$\"\"$ (Substitute again)

\

$\"\"$ (Simplify)

\

$\"\"$ .

\

$\"\"$

\

Find $\"\"$ .

\

$\"\"$ (Composition of functions formula)

\

$\"\"$ (Substitute $\"\"$ )

\

$\"\"$ (Substitute again)

\

$\"\"$ (Differences of square: $\"\"$ )

\

$\"\"$ (Simplify)

\

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

\

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