$\"\"$

The expression is $\"\"$ .

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

Apply commutative property of multiplication: $\"\"$ .

$\"\"$

Apply commutative property of multiplication: $\"\"$ .

$\"\"$

$\"\"$ (The product of two different signs is negative)

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

The simplified expression is $\"\"$ .