$\"\"$

The expression is $\"\"$ .

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

$\"\"$ (Product of two different signs is negative)

$\"\"$ (Product of two same signs is positive) $\"\"$

Mixed fraction can written as proper fraction.

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

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

$\"\"$

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

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

The product is $\"\"$ .