Rewrite the following expressions so that each variable appears only once, no negative exponents appear, and no radicals appear. Assume that all variables represent positive values. (2z^2)^-5 z^10 (3x^4/4x^2)^-2 5xy^-2/x^-1y^-3 (xy^-3z^2)^4/(x^4y^2z^-2)^3 (2x^3y^-1/4)^2 (8y^-3/2)^-1/3 squareroot x^3 3squareroot x^4/x^2 squareroot x squarerrotx^3