计算:(1)（x+y）^9/(x+y)^5(2)(x^2+x+1)/(3)0.0001^0(4)(x+3y/2x-y)^

计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8 （x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3) 有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*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) 计算(x+y)(x+y)^2(-x-y)^3 计算:(2/3x√9x+6x√y/x)+(y√x/y-√1/x) 1、x(x-y)(x+y)-x(x+y)^2 计算:(-x-2y) * (3x-y) 先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y 分解因式计算:x^2(x-y)+(y-x)=?x^3+x^2+1\4x=?(2x+y)^2-(x-2y)^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