计算:(3x^2-2y^2)-(-x^2+2xy+y^2)-(x^2-4xy+3y^2)
(x^2+xy/x-y)/(xy/x-y)计算
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
x-y/xy-y^2计算
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
(xy-x^2)乘以(xy)/(x-y)
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
计算(xy-y^2)÷x-y/xy
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2