$\"\"$

The rational expression is $\"\"$ .

Find the sum and difference.

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

$\"\"$

$\"\"$ (Distributive property: $\"\"$ )

$\"\"$ (Combine like terms)

$\"\"$ (Simplify)

$\"\"$ .

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

$\"\"$ .