计算x²y·(-4xy³)²
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计算:-2x²y(-2xy²)²+(2xy)³·(xy²)
分解因式计算6x³y(x-y)³-4xy³(y-x)²
计算[(x²-y²)/y]²÷(x²+xy)³·(xy/y-x)
(xy-x²)²÷(x-y)²/xy·x-y/x² 计算
x·(9x³y-3xy²)÷(﹣3x²y) 计算
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算[xy(x²-3y)+3xy²]·(-2xy)+x³y²(2x-y)
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算:(-7x²y)(2x²y-3xy³+xy)
计算:(xy-x²)乘 x-y分之xy