In Exercises 59–76, find the indicated root, or state that the expression is not a real number.___−⁴√256

In Exercises 59–72, simplify each expression using the products-to-powers rule.(5x³y⁻⁴)⁻²

In Exercises 55–78, use properties of rational exponents to simplify each expression. Assume that all variables represent positive numbers.(2x^⅕)⁵

In Exercises 65–74, simplify each radical expression and then rationalize the denominator.5m⁴n⁶√ -------------15m³n⁴

In Exercises 61–82, multiply and simplify. Assume that all variables in a radicand represent positive real numbers and no radicands involve negative quantities raised to even powers.__ _3√15 ⋅ 5√6

In Exercises 59–72, simplify each expression using the products-to-powers rule.(-2x⁻⁵y⁴z²)⁻⁴

In Exercises 55–78, use properties of rational exponents to simplify each expression. Assume that all variables represent positive numbers.(25x⁴y⁶)^½

Simplify by reducing the index of the radical : [y^3]^(1/6)

Simplify each radical. Assume all variables represent positive real numbers. √192