5x^2(-3y)^2+(-4xy^2)(-x^2y)化简谢谢!

5xy^2-[3xy^2-(4xy^2-2x^y)]+x^2y-xy^2如何化简 [-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y- x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 化简分式方程:x*x-xy-y*y/x*x-3x-6y+2xy 化简求值3x-2y-5xy-（2x-3y+2xy）,其中x+y=4,xy=-7 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 谁帮我化简：[(x+y)(x-y)-(x+y)^2-2y(x-y)-2xy]÷xy 2x方+xy-y方-4x+5y-6（分解因式）,谢谢! 因式分解 求过程 x-xy+3y-3x 2x+xy-y-4x+5y-6 计算:已知x+y=2xy,求（4x-5xy+4y)/(xy-x-y)的值【=-=速回O(∩_∩)O谢谢】 已知x,y>0 2x+y+3=xy 求5x+4y最小值