x³-x²y-xy²+y³

[-xy/(x-y)²]²×(y²-xy/x)³ -x³y³-x²y²+xy x³y-2x²y²+xy³ (3xy)² · (x²+xy-y²)-3xy(3x³y+3x²y&# 先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y x²/xy-x/y 化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x&# [x（x²y²-xy）-y（x²-x³y）]÷3x²y 【x(x²y²-xy)-y(x²-x³y)】÷3x²y 因式分解：[x（x²y²-xy）-y（x²-x³y）]÷3x²y 分解因式计算6x³y（x-y)³-4xy³(y-x)² 计算：(xy-x²)×x-y/xy