计算:(2x+y-z)^2 就这一题.计算:(2x+y-z)^2

计算题(x+y)^2(y+z-x)(z+x-y)+(x-y)^2(x+y+z)(x+y-z). 计算（x-y-z)^2 计算:x^2/(x-y)(x-z)+y^2/(y-x)(y-z)+z^2/(z-x)(z-y) 计算:(2x+y-z)^2 就这一题.计算:(2x+y-z)^2 计算(2x+y+z)(2x-y-z), 计算(x+2y-z)(2y+z-x) 计算(x-2y+z)(z-x-2y), (x一2y+z)(-x+2y+z)(计算) 计算:(x+2y-z)(x-2y-z) 计算(x+2y-z)(2y+z-x) 计算：(x-y-z)^2-(x-y+z)^2 (x+2y-z)(x-2y-z)计算过程 计算：(x+2y-z)(x-2y+z) 计算:(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z)/(y+z-2x)(x-2y+z) (2x+3y-z)^2 计算题、 计算题（2x-y-z）的平方 计算题 (2x-y +z)的平方 急 2(x+y-z)-3(x-y+z)-5(x+y-z)+6(x-y+z) 计算