计算 (x²+2xy+y²)(x²-xy+y²)²
计算:(xy-x²)×x-y/xy
计算:(xy-x²)乘 x-y分之xy
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
计算 (x²+2xy+y²)(x²-xy+y²)²
(xy-x²)²÷(x-y)²/xy·x-y/x² 计算
计算:(-7x²y)(2x²y-3xy³+xy)
分式计算:(x²+2xy+y²)/(x²y+xy)*y/(x+y)
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
计算:x²y-(2xy²-5x²y)+3xy²-y³
计算(2x³-3x²y-2xy²)-(x³-2xy²+y³)