Factor out of .

Factor out of .

Cancel the common factor.

Rewrite the expression.

Factor out of .

Factor out of .

Cancel the common factor.

Rewrite the expression.

Factor the perfect power out of .

Factor the perfect power out of .

Rearrange the fraction .

Pull terms out from under the radical.

Rewrite as .

Pull terms out from under the radical, assuming positive real numbers.

Combine and .

Simplify fourth root of (16x^11y^8)/(81x^7y^6)