(xy-x²)÷(x²-2xy+y²/xy)×（x-y/x²）

x-y/x²÷x²-2xy+y²/xy*（xy-x²） 计算：(xy-x²)×x-y/xy x²/xy-x/y 计算；（xy-x²）÷x²-2xy+y²/xy · x-y/x² (xy-x²）²÷（x-y)²/xy·x-y/x² 计算 计算：（xy-x²）乘 x-y分之xy [-xy/(x-y)²]²×(y²-xy/x)³ x/xy-y²与y/x²-xy 通分 2x(x²y-xy²)+xy(xy-x²)]÷x²y等于多少 （xy-x²）除以xy分之x²-2xy+y²乘以x²分之x-y 3x²y+xy²-[2xy²-4x²y+（x²y-2xy²） 计算：x²+2xy+y²/xy-y².x²-2xy+y²/xy+y&#