计算[5xy²(x²-3xy)-(-3x²y²)³]÷(-5xy)
计算[5xy²(x²-3xy)-(-3x²y²)³]÷(-5xy)
计算:x²y-(2xy²-5x²y)+3xy²-y³
计算;[5xy²(x²-3xy)+(3x²y²)³]÷(5xy)
计算:(-7x²y)(2x²y-3xy³+xy)
计算:(xy-x²)×x-y/xy
计算:(xy-x²)乘 x-y分之xy
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(xy-x²)²÷(x-y)²/xy·x-y/x² 计算
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
化简(3X²-XY+Y²)-5(X²-XY+2Y²)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
计算(2x³-3x²y-2xy²)-(x³-2xy²+y³)