计算(x²+2xy+y²)(x²-xy+y²)²
计算:(xy-x²)×x-y/xy
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
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]
x²/xy-x/y
计算 (x²+2xy+y²)(x²-xy+y²)²
计算(x²+2xy+y²)(x²-xy+y²)²
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
计算:(-7x²y)(2x²y-3xy³+xy)
计算:2x+2y分之3y + x²+xy分之2xy
计算:-2x²y(-2xy²)²+(2xy)³·(xy²)