xy(2x+y)^2计算
计算:3xy[2xy-x(y-2)+x]
(x^2+xy/x-y)/(xy/x-y)计算
x-y/xy-y^2计算
计算(xy-y^2)÷x-y/xy
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算3xy[2xy-x(y-2)+x-1]
计算,(x^2-xy)/(xy^2)·y/(y-x) 分式的 乘法,
计算(3x^3y-x^2y+1/2xy)÷(-1/2xy)
计算 (x²+2xy+y²)(x²-xy+y²)²
计算:(-7x²y)(2x²y-3xy³+xy)
计算 (x平方+2xy+y平方)(x平方-xy+y平方)平方