计算:[(x+2y)(x-2y)+(x-2y)^2]÷(6x)
计算:(x-y)^2*(y-x)^2*(x-y)^6
计算:(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2
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)+【-
[(2x+y)(x-3y)+y(x+3y)]÷(2x)计算,
1、x(x-y)(x+y)-x(x+y)^2
计算:(x—y)^7÷(y—x)^6+(—x—y)^3÷(x+y)^2
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算 {2(x-y)的平方-8(x-y)的平方(x+y)+6y(x-y)的平方}÷2(x-y)的平方 等于
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y