计算:(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2
计算:(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2
计算:(x—y)^7÷(y—x)^6+(—x—y)^3÷(x+y)^2
[(2x+y)(x-3y)+y(x+3y)]÷(2x)计算,
计算:(x-y)^2*(y-x)^2*(x-y)^6
计算:(-x-2y) * (3x-y)
计算(x+y)(x+y)^2(-x-y)^3
计算:(x+y/x-y)÷(xy+x^2)
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)+【-
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
计算:(x+2y)(3x-5y)-(6x的四次方y²-2x²y²)÷(2x²y&
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)
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y