$\"\"$

The expression is $\"\"$ .

Simplify the expression.

$\"\"$ (Original expression)

$\"\"$ (Definition of negative exponents: $\"\"$ )

$\"\"$ (Product of powers: $\"\"$ )

$\"\"$ (Simplify)

$\"\"$ (Definition of negative exponents: $\"\"$ )

$\"\"$ .

$\"\"$

The simplified expression is $\"\"$ .