计算:(2x+y+z)(2x-y-1)打错了是(2x+y+1)(2x-y-1)

计算:x^2/(x-y)(x-z)+y^2/(y-x)(y-z)+z^2/(z-x)(z-y) 计算（x-y-z)^2 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) 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:(2x+y+z)(2x-y-1)打错了是(2x+y+1)(2x-y-1) 1、y-x/x²-y²2、(x-y)(y-z)(z-x)/(z-y)(y-x)(x-z) 2(x+y-z)-3(x-y+z)-5(x+y-z)+6(x-y+z) 计算 运用乘法公式计算1:（x+y+2z)(x-y-2z）2：（x+2y-z)² (1)(x+y+2z)(x-y-2z) (2)(x+2y-z)²运用乘法公式计算 计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)计算(X+3Y+2X)(-X-3y-2Z)