计算2x^2y·(-8y^2)+4x^2y·5y^2

计算 (x^8+y^8)(x^4+y^4)(x^2+y^2)(x+y)(x-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:2xy/(x+y)².(x+y)/4y 计算:y-x分之x+y+x-y分之y-y-x分之2x-y 计算2x/x-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) 计算：(8y^2/x-2y)+(x^2/2y-x)-(4y^2/x-2y) 计算:(x+2y)(2x-y) 计算:(x+3y)(2x-y) 计算:(2x-3y)(x+y) 计算:(-x-2y) * (3x-y) 计算：(x+y)-3(x-2y). 计算（2x-3y)(x+4y)-(3x+y)(x-2y)（2x-3y)(x+4y)-(3x+y)(x-2y) （x-y)^2+7(x+y)-11(x-y)^2-8(X+Y)的计算过程 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x (x-3y)(y+2x)-(4y-3x)(3x+4y)计算 计算：[(x+y)(x-y)-(x-y)^2+2y(x-y)]/(-2y) 计算:(x-y)^2*(x+y)^3*(-x-y)^3*(y-x)^4