计算(-x-y)(y-x)+(-x-y)(x+y),
{(x,y) |x|+|y|
x>y?x:y
计算(x+y)(x+y)^2(-x-y)^3
计算:(x-y)^2*(y-x)^2*(x-y)^6
计算(一x一y)(x一y)+(x+y)
计算:(-x-2y) * (3x-y)
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)+【-
数学计算填空(5x+y)(5x-y)(5x+y)(-5x+y)(5x+y)(-5x-y)(5x+y)(x-5y)(x ^
ⅠX Y X+Y Ⅰ ⅠY X+Y X Ⅰ Ⅰ X+Y X YⅠ行列式计算
用行列式性质计算(需过程):(x,y,x+y; y,x+y,x; x+y,x,y )
(x+y)
X、Y