2+3=
5
1-1=
0
4x4=
16
12+9=
21
7-4=
3
7x2=
14
43+12=
55
32-9=
23
6x7=
42
4+5+3=
12
8-3-3=
2
3x4x2=
24
124+32=
156
923-432=
491
45x5=
225