3-2=
1
3-1=
2
3+8=
11
10+ 4=
14
13-10=
3
6+9=
15
20+12=
32
25-10=
35+5=
40
50+41=
91
40-21=
19
56+2=
58
110+123=
233
500-200=
300
100+250=
350
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