有这样一道题:“计算(2x^3-3x^2y-2xy^2)-(x^3-2xy^2+y^3)-(x^3+x^2y+y^3的值
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)+【-
有这样一道题,计算(2x立方-3x平方y-2xy平方)-(X立方-2XY立方)+(-X立方+3XY-Y立方)
有这样一道题:“计算(2x^3-3x^2y-2xy^2)-(x^3-2xy^2+y^3)-(x^3+x^2y+y^3的值
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
有这样一道计算题:“计算(2x-3xy-2xy)-(x-2x+y)+(-x+3xy-y)的值,其中“x=1/2,y=-1
有这样一道题:"计算(x^3+3x^2y-4xy^2)-(2x^3-x^2y-xy^2)+(x^3-4x^2y+3xy^
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
计算:(x^2-y^2/xy)^2/(x+y)^2*(x/x-y)^3
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
(x+y)(x-y)-(2xy+3y)平方