4x^2y^3(2x^2-3xy+5y^2)÷（-4x^2y^2)怎么做

(x^2-xy)y÷y-x/xy怎么做? [-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y- 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 (2x-y)(2x+y)+(2x-y)(y-4x)+2y(y-3x)+2x^4y^2÷(xy)^2 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) [(3x+y)²-(3x-y)²]÷(4x-2y)计算 怎么做? 4x^3-4x^2y+2x^2-2xy因式分解怎么做 已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)} 已知x,y>0 2x+y+3=xy 求5x+4y最小值 x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 因式分解 求过程 x-xy+3y-3x 2x+xy-y-4x+5y-6