(3x-³y-²)²÷9×﹙⅓x²y-¹﹚³

(3x-³y-²)²÷9×﹙⅓x²y-¹﹚³ (x-y)³+9(x-y)-6(x-y)² [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 计算 [12(x+y)³(y-x)]³÷[4(x+y)²（x-y)]² (-3x²y³z) * x³(x²y)² ÷ 9x⁴y五次 (x-y)³(x-y)²(y-x)等于多少 x·（9x³y-3xy²)÷（﹣3x²y) 计算 化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x&# 求因式分解(x-y)²-2(x-y)³和（x+y）（x-y）-x（x-y） 先化简,再求值：（3x²y-2）×y-（9x的4次方y³-15x²y²）÷（3x