7-1=
6
4-2+2+10=
14
5+5+5-3=
12
7+3-5=
5
6-5+2=
3
20-10
10
5+3+10=
18
2-1+2=
3
10+10=
20
2+4+3-4=
5
30-30+15=
15
35-5-5=
25
10-5-4-1=
0
6-3+3=
6