计算:(-x/y^2)^4(-4x^2y/3w)^3(-6x^3y^4)除(-2xy)^3(5x^4y^2-x^2y^4
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)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
计算:(-x/y^2)^4(-4x^2y/3w)^3(-6x^3y^4)除(-2xy)^3(5x^4y^2-x^2y^4
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
计算(2x-3y)(x+4y)-(3x+y)(x-2y)
计算[4/(x^2-y^2)+(x+y)/(xy^2-x^2y)]除[(x+2y)(x-y)/(x^2+2xy^2)
(2x-y)(2x+y)+(2x-y)(y-4x)+2y(y-3x)+2x^4y^2÷(xy)^2
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
[-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y-
因式分解 求过程 x-xy+3y-3x 2x+xy-y-4x+5y-6