$\"\"$

The expression is $\"\"$

$\"\"$ (Remove parentheses)

Group like terms using commutative and associative properties

$\"\"$ (Apply commutative property: $\"\"$ )

$\"\"$ (Apply Additive inverse property: $\"\"$ )

$\"\"$ (Subtract: $\"\"$ )

$\"\"$ (Apply Additive identity property: $\"\"$ ) $\"\"$

The simplified expression is 2.