$\"\"$

The expression is $\"\"$ .

Simplify the expression.

$\"\"$ (Original expression)

$\"\"$ (Commutative property of multiplication: $\"\"$ )

$\"\"$ (Associative property of multiplication: $\"\"$ )

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

$\"\"$ .

$\"\"$

The solution is $\"\"$ .