1.[4x-2y]+[2x-y]2.[4x-2y]-[2x-y]3.-4[x-3]-[3x-5]4.-4x-[-1/3x]+[-1/4x]5.[7-3a]+[5a-6]6.[x-3]-[5x+7]7.[2x-y]-2[3x-1/2y]8.操作电脑时,小明2H打了M个字,小李4H打了N个字,这小明和小李每小时共打了___个字9.三个连续奇数,若

1.[4x-2y]+[2x-y]2.[4x-2y]-[2x-y]3.-4[x-3]-[3x-5]4.-4x-[-1/3x]+[-1/4x]5.[7-3a]+[5a-6]6.[x-3]-[5x+7]7.[2x-y]-2[3x-1/2y]8.操作电脑时,小明2H打了M个字,小李4H打了N个字,这小明和小李每小时共打了___个字9.三个连续奇数,若
1.[4x-2y]+[2x-y]
2.[4x-2y]-[2x-y]
3.-4[x-3]-[3x-5]
4.-4x-[-1/3x]+[-1/4x]
5.[7-3a]+[5a-6]
6.[x-3]-[5x+7]
7.[2x-y]-2[3x-1/2y]
8.操作电脑时,小明2H打了M个字,小李4H打了N个字,这小明和小李每小时共打了___个字
9.三个连续奇数,若中间一个为N,则其他两个分别为_____,这两三个连续奇数的和为______
10.一个长方体.他的长.宽.高分别是3.2.X,求这个长繁体的六个面的面积的和.
11.【A+B+C][A-B+C]=[A+[ ] [A-[ ]]
12.【-A+B+C][A+B-C]=[B-[ ]] [B+[ ]]

1.[4x-2y]+[2x-y]2.[4x-2y]-[2x-y]3.-4[x-3]-[3x-5]4.-4x-[-1/3x]+[-1/4x]5.[7-3a]+[5a-6]6.[x-3]-[5x+7]7.[2x-y]-2[3x-1/2y]8.操作电脑时,小明2H打了M个字,小李4H打了N个字,这小明和小李每小时共打了___个字9.三个连续奇数,若
1、4x-2y+2x-y=6x-3y
2、4x-2y-2x+y=2x-y
3、-4x+12-3x+5=17-7x
4、-4x+1/3x-1/4x=-4x+1/12x
5、7-3a+5a-6=1+2a
6、x-3-5x-7=-4x-10
7、2x-y-6x+1/y=-4x-y+1/y
8、2M+4N
9、N-1,N+1 3N
10、10x+12
11、B+C B-C
12、A-C A-C