化简（‐x)^3(‐y)^2‐(‐x^3 y^2) (a‐b)^3(b‐a)^5

化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x 分解因式:[(2x^2-(x+y)(x-y)][(z-x)(x+z)-(-y-z)(z-y)]+z,其中x=‐1,y=1/2,z=‐3/4 分解因式:[(2x^2-(x+y)(x-y)][(z-x)(x+z)-(-y-z)(z-y)]+z,其中x=‐1,y=1/2,z=‐3/4 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 化简:5(x-y)+2(x+y)-3(x-y) 化简3(x-y)-7(x--y)+2(y-x) 若|x+2|+|y‐2|=6‐|x‐3|‐|y‐1|,求x+y的最大值与最小值（写过程）. 化简(X-2Y)-(Y-3X) 化简 3x(x^2-x-1)-(x+1)(3x^-x) X^3(x-y)+x(y-x) (x+y)-(x-y)^3÷(x-y)(x+y)×2y化简e , 化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/【(x-y)/x】的负二次方 化简（‐x)^3(‐y)^2‐(‐x^3 y^2) (a‐b)^3(b‐a)^5 化简（‐x)^3(‐y)^2‐(‐x^3 y^2) 还加一个,(a‐b)^3(b‐a)^5 x(x-y)2-(y-x)3 [2/3x-2/x+y(x+y/3x-x-y)]/x-y/x 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x 化简：3x（2x+y)-2x(x-y) x是字母x不是乘号