(x^2y)^4xy^-3=x^(2×4+1)y^(4-3)=x^9y
4^-2x^5(2^3x^-2)^2=1/16×8 x^(5-2)=1/2x³
(5^3*15^-2)/3^-2=5³×1/3²×1/5²÷1/3²=5