Question

请给我出10道合并同类项，并且带括号，难度中等的题

例如：4（y+1)+4(1-x)-4(x+y)

Answer 1

1．3ab-4ab+8ab-7ab+ab=______．

2．7x-(5x-5y)-y=______．

3．23a3bc2-15ab2c+8abc-24a3bc2-8abc=______．

4．-7x2+6x+13x2-4x-5x2=______．

5．2y+(-2y+5)-(3y+2)＝______．

6．(2x2-3xy+4y2)+(x2+2xy-3y2)=______．

7．2a-(3a-2b+2)+(3a-4b-1)=______．

13．-6x2-7x2+15x2-2x2＝______．

14．2x-(x+3y)-(-x-y)-(x-y)＝______．

16．2x+2y-[3x-2(x-y)]=______．

17．5-(1-x)-1-(x-1)=______．

18．( )+(4xy+7x2-y2)=10x2-xy．

19．(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3．

21．已知A=x3-2x2+x-4，B=2x3-5x+3，计算A+B=______．

22．已知A=x3-2x2+x-4，B=2x3-5x+3，计算A-B=______．

23．若a=-0.2，b=0.5，代数式-(|a2b|-|ab2|)的值为______．

25．一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1，那么这个多项式等于______．

26．-(2x2-y2)-[2y2-(x2+2xy)]=______．

27．若-3a3b2与5ax-1by+2是同类项，则x=______，y=______．

28．(-y+6+3y4-y3)-(2y2-3y3+y4-7)＝______．

29．化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______．

30．2a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( )．

31．3a-(2a-3b)+3(a-2b)-b=______．

32．化简代数式x-[y-2x-(x+y)]等于______．

33．[5a2+( )a-7]+[( )a2-4a+( )]=a2+2a+1．
34．-2(3x+z)-(-6x)+(-5y+3z)=______．

35．-5an-an+1-(-7an+1)+(-3an)＝______．

36．3a-(2a-4b-6c)+3(-2c+2b)=______．

37．9a2+[7a2-2a-(-a2+3a)]=______．

追问

每道题都要带括号

追答

7(x-3)-5(2x-1)
m2+(-mn)-n2+(-m2)-(-0.5n2)
2x2-{-3x+6+[4x2-(2x2-3x+2)]}
a-(a-3b+4c)+3(-c+2b)
a-(a-3b+4c)+3(-c+2b)
m2+(-mn)-n2+(-m2)-(-0.5n2)
(3x-5y)-(6x+7y)+(9x-2y)
3a-(2a-4b-6c)+3(-2c+2b)
6-5b-(3a-2b)-(1-6b)
(5x-4y-3xy)-(8x-y+2xy)