$\"\"$

The expression is $\"\"$ .

For any real number b and for any positive integer n, $\"\"$ .

$\"\"$

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

$\"\"$ (Apply Power of a power property: $\"\"$ ) $\"\"$

Apply quotient of a power property: $\"\"$ .

$\"\"$

$\"\"$ (Apply L.C.M rule: $\"\"$ )

$\"\"$

For any real number b and for any positive integer n, $\"\"$ .

$\"\"$

The simplified expression is $\"\"$ .