$\"\"$

The expression is $\"\"$ .

Divide by a fraction, multiply by its multiplicative inverse.

So, $\"\"$ , where $\"\"$ .

$\"\"$

If $\"\"$ , where b,d $\"\"$ .

$\"\"$

$\"\"$ (Cancel common terms)

$\"\"$ (Multiply numerator: $\"\"$ ) \ \

$\"\"$ (Multiply denominator: $\"\"$ ) $\"\"$

The simplest form is $\"\"$ .