（y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy)
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（y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy)（y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy)（y/(x^2-xy)+x/(y^2-xy))除以(x-y)
（y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy)
（y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy)
（y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy)
[y/(x^2-xy)+x/(y^2-xy)]/(x-y)/xy
=[y/x(x-y)-x/y(x-y)]/(x-y)/xy
=[y/x(x-y)]*[xy/(x-y)]-x/y(x-y)*[xy/(x-y)]
=y^2/(x-y)^2-x^2/(x-y)^2
=(y-x)(y+x)/(x-y)^2
=-(y+x)/(x-y)
=(y+x)/(y-x)
(-x-y)(x^2+xy+y^2)
化简x^-y^/x^-2xy+y^
2*(x-y)²(y-x)(xy)
（x^2+xy/x-y)/（xy/x-y)计算
X-Y/2X+2Y XY/X+Y²
因式分解：x×x-xy-2y×y-x-y
(x+y)/x /(x-(2xy-y^2)/x) 因式分解
代数 x^-y^/ x^-(y-z)^ 除以 x^+2xy+y^/(x-y)^-z^ 乘 x^+xy-xz/x^-xy
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
(x-y)[(x+y)^2-xy]+(x-y)[(x-y)^2+xy]
x根号x+x根号y/xy-y^2)-（x+根号xy+y/x根号x-y根号）y
.(x+y-2)(x+y-2xy)+(xy-1)^2
(x^2-xy)y÷y-x/xy怎么做?
[x(x^2y^2-xy)-y(x^2-x^3y)]/(2x^2y)
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
2xy/(x+y)(x+y)与x/(x+y)(x-y)怎么通分
(x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1)