因式分解(x+y-z)*[(x+y)^2+(x+y)*z+z^2]怎么化简

因式分解 (x+y+z)^2+yz(y+z)+xyz 2道超难的因式分解因式分解或化简都行（y+z-2x)^2+(z+x-2y)^2+(x+y-2z)^2 因式分解a^3-a (y-x)/(x+z-2y)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z 因式分解：25x y^2 z^2 (x+y-z)-30xyz(z-x-y)^2+5x y z^3 (z-x-y) 如何化简(x+y+z)(x+y-z)(x-y+z)(-x+y+z) x,y,z正整数 x>y>z证明 x^2x +y^2y+z^2z>x^(y+z)*y^(x+z)*z^(x+y) 化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+（z-y)(x-y)/(x-2z+y)(y+z-2x)+(x (x-2y+z)(x+y-2z)分之（y-x)(z-x) + (x+y-2z)(y+z-2x)分之(z-y)(x-y) 因式分解2(x^2y^2+y^2z^2+z^2x^2)-(x^4+y^4+z^4) (x+2y-7z)^3+(3x-4y+6z)^3-(4x-2y-z)^3 因式分解 因式分解(Y+Z)(X+Z)+(X+Y)+XYZ 因式分解：(y+z)(x+z)(x+y)+xyz