计算 (x^8+y^8)(x^4+y^4)(x^2+y^2)(x+y)(x-y)

计算：(x-y)^8÷(y-x)^4×(x-y) 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: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：8x^2y^4(-3x/4y^2)/(-x^2y/2) 计算(x+2y)(x-2y)(x^4-8x^2y^2+16y^4) (X-Y)^8÷(Y-X)^4÷(X-Y)^3=-(X-Y)这个计算结果对吗? 计算 3x+4y/x-y+3y/y-x-4x/x-y 计算：（1）8x^2y^2*(-3x/4y^5) (2)(x+y)^2/xy-y^2*(y-x)^2/xy+y^2 3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算 计算：x²-y²/x·-x²/(x-y)²；8y²y³·（-3x/4y²）. 计算:2xy/(x+y)².(x+y)/4y 计算,(x-y-x-y分之4y的平方 计算2x^2y·(-8y^2)+4x^2y·5y^2 计算（2x-3y)(x+4y)-(3x+y)(x-2y)（2x-3y)(x+4y)-(3x+y)(x-2y) 计算：[(-3x^2*y^4)^2*x^3-2x(3x^2*y^2)^3*1/2y^2]/9x^7y^8 计算:[(4x^3-1/2y)^2+4y(x^2-y/16)]/(8x^2)