计算[(x²-y²)/y]²÷(x²+xy)³·(xy/y-x)
计算:(xy-x²)×x-y/xy
计算[(x²-y²)/y]²÷(x²+xy)³·(xy/y-x)
(xy-x²)²÷(x-y)²/xy·x-y/x² 计算
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
[-xy/(x-y)²]²×(y²-xy/x)³
x·(9x³y-3xy²)÷(﹣3x²y) 计算
x²/xy-x/y
计算:(xy-x²)乘 x-y分之xy
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
计算:1、(xy分之x²-y²)×(x-y分之x)-(y分之x);
x-y/x²÷x²-2xy+y²/xy*(xy-x²)