(x^2-xy)/(xy-y^2)-(y^2+xy)/(x^2+xy)+(x^2+y^2)/xy2.(x-2)/x^2/(1-2/x)

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(x^2-xy)/(xy-y^2)-(y^2+xy)/(x^2+xy)+(x^2+y^2)/xy2.(x-2)/x^2/(1-2/x)
(x^2-xy)/(xy-y^2)-(y^2+xy)/(x^2+xy)+(x^2+y^2)/xy
2.(x-2)/x^2/(1-2/x)

(x^2-xy)/(xy-y^2)-(y^2+xy)/(x^2+xy)+(x^2+y^2)/xy2.(x-2)/x^2/(1-2/x)
(x^2-xy)/(xy-y^2)-(y^2+xy)/(x^2+xy)+(x^2+y^2)/xy
=x(x-y)/(y(x-y))-y(x+y)/(x(x+y))+(x^2+y^2)/xy
=x/y-y/x+(x^2+y^2)/xy
=(x^2-y^2)/xy+(x^2+y^2)/xy
=2x^2/xy
=2x/y

x(x-y)/y(x-y)-y(y+x)/x(x+y)+(x^2+y^2)/xy
=x/y-y/x+(x^2+y^2)/xy
=x^2/xy-y^2/xy+(x^2+y^2)/xy
=(x^2-y^2+x^2+y^2)/xy
=2x^2/xy
=2x/y
(x-2)/x^2/(1-2/x)
=(x-2)/[(x-2)/x]/x^2
=x*(x-2)/(x-2)/x^2
=x/x^2
=1/x

不是因式分解吧？
化简：
(x^2-xy)/(xy-y^2)-(y^2+xy)/(x^2+xy)+(x^2+y^2)/xy
=x(x-y)/[y(x-y)]-y(y+x)/[x(x+y)]+(x²+y²)/(xy)
=x/y-y/x+(x²+y²)/(xy)
=(x²-y²+x²+y²)/(xy)
=2x²/(xy)
=2x/y

我看不懂

x^2-xy/xy-y^2约分 2x²y-3(2xy-xy)-xy （x^2+xy/x-y)/（xy/x-y)计算 (x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy) .(x+y-2)(x+y-2xy)+(xy-1)^2 (x^2-xy)y÷y-x/xy怎么做? (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) ((xy+2)(xy-2)-2x²y²+5(xy-y)²)÷(2xy) （y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy) x^2-xy-6y^2+3xy+y+2 计算（xy-y^2)÷x-y/xy 初二数学化简分式x^2 -y^2/xy - xy-y^2/xy-x^2x^2 -y^2/xy - xy-y^2/xy-x^2 计算：x²+2xy+y²/xy-y².x²-2xy+y²/xy+y² xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2 （X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程 x^2y-2xy+y化简