3x-【(y-x)-2x-y】 去括号,

3x-【(y-x)-2x-y】 去括号, 去括号3（x-y)-2(2x-y)= (2x-3y)-(5x-y)去括号 (2x+3y)-(5x-y)去括号 整体去括号；化简[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y) 整体去括号；[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)化简 3x-2y-[-4x+(x+3y)]+y 去括号然后合并同类项, x+(-y+3) x-(-3-y) -(x-y)+3 3-(X+Y) 怎样去括号?快 (3+x)(3+y)去括号 3(x+y)平方怎么去括号 3(x-y)平方怎么去括号 —[—(3x-y)]去括号. —[—(3x-y)]去括号. 去括号x-3(y-1) x-2(y-z)去括号=（ 去括号 -(x-2y-z)=? 3x-(3x+4y)+(4x+2y)去括号,并合并同类项 去括号(4x-3y)-[-(3-x)+(x-y)]-5x 还是去括号4xy²-3x²y-{3x²+xy²-[2xy²-4x²y+(x²y-2xy²)]}