$\"\"$

The expression is $\"\"$ .

$\"\"$ (Group powers with the same base)

$\"\"$ (Apply product property of power functions: $\"\"$ )

$\"\"$ (Substitute product property of powers $\"\"$ )

$\"\"$ (Apply negative exponents property: $\"\"$ )

$\"\"$ (Multiply)

Therefore, the simplified expression is $\"\"$ .

$\"\"$

The simplified expression is $\"\"$ .