计算:(-2x^2y)^2·(-3xy)
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
(x^2+xy/x-y)/(xy/x-y)计算
计算:(2分之1x^(2)y-2xy+y^(2))·3xy
x-y/xy-y^2计算
计算(xy-y^2)÷x-y/xy
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算,(x^2-xy)/(xy^2)·y/(y-x) 分式的 乘法,
计算3y/(2x+2y)+2xy/x^2+xy
计算(3x^3y-x^2y+1/2xy)÷(-1/2xy)