计算:(x-y)^2-(x+y)(x-y)
计算:(-x-2y) * (3x-y)
计算:(x-y)^2*(y-x)^2*(x-y)^6
计算(x+y)(x+y)^2(-x-y)^3
计算:1/(2x) - 1/(x+y)((x+y)/(2x) - x - 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)+【-
用行列式性质计算(需过程):(x,y,x+y; y,x+y,x; x+y,x,y )
计算:(3x-y)2-(2x+y)2+5x(y-x)
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
(x+y)^2-(3x-2y)^2计算
初二下册计算:(x-y /x+2y)³
计算(x^2-y^2)÷(x分之x-y + y^2分之x^2-y^2 - x-y分之x+y)
计算2x/x^2-y^2 3x/y^2-x^2 y/(x y)(y-x)快!