3x-(3x+4y)+(4x+2y)去括号,并合并同类项

3x-2y-[-4x+(x+3y)]+y 去括号然后合并同类项, 3x-【(y-x)-2x-y】 去括号, (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= 3x-(3x+4y)+(4x+2y)去括号,并合并同类项 (x+3y-4)(2x-y) 计算（2x-3y)(x+4y)-(3x+y)(x-2y)（2x-3y)(x+4y)-(3x+y)(x-2y) 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² 去括号并合并同类项(1)3x-2(x+7)+2(2x+5) （2）（4x-3y)-[-（3y-x)+（x-y)]-5x （y-x)+x(x-y)^3-(y-x)^4 因式分解 去括号(4x-3y)-[-(3-x)+(x-y)]-5x 还是去括号4xy²-3x²y-{3x²+xy²-[2xy²-4x²y+(x²y-2xy²)]} (2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y) 1,5{2x-7y}-3{4x-10y} 2,{x-y}-[3x+{-x+y}] 去括号,合并同类项, 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 计算 3x+4y/x-y+3y/y-x-4x/x-y 3x+4y/x-y +3y/y-x -4x/x-y x(4y-x)(x-3y)+y(3y-x)(x-4y)因式分解