$\"\"$

The rational expression is $\"\"$ .

Find the sum and difference.

$\"\"$ (Factors)

LCM of $\"\"$ is $\"\"$ .

$\"\"$

$\"\"$ (Multiply)

$\"\"$ (Combine like terms) $\"\"$ .

Therefore, the sum and difference of the rational expression is $\"\"$ . $\"\"$

$\"\"$ .