计算：(x/x-y)*(y^2/x+y)-(x^4y/x^4-y^4)/x^2/x^2+y^2

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计算：(x/x-y)*(y^2/x+y)-(x^4y/x^4-y^4)/x^2/x^2+y^2
如题,快,十分钟发

(x/x-y)*(y^2/x+y)-(x^4y/x^4-y^4)/x^2/x^2+y^2
=x*y^2/(x^2-y^2)-(x^4y/(x^2-y^2)(x^2+y^2)) * (x^2+y^2)/x^2
=x*y^2/(x^2-y^2)-x^2y/(x^2-y^2)
=xy(y-x)/((x-y)(x+y))
= -xy/(x+y)

x^2-y^2/x+y-4x(x-y)+y^2/2x-y, 计算(x-2y)^2-4(2x+y)(y-2x)+4x(y-2) 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(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2) (2x-y)^2-4(x-y)(x+2y) (2x-y)²-4(x-y)(x+2y) 化简：（2x-y)²-4(x-y)(x+y) x+2y+4y^2/x-y+4x^y/4y^2-x^2 x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2 4x(y-x)-y^2因式分解