12+8
20
9+4
13
11+6
17
6+0
6
8+9
33+45
78
34+56
90
43-11
32
73-30
43
32+56
88
45-38
7
93-44
49
293+148
441
264+77
341
44-26
18
1234-367
867
2454+964
3418
600-398
202
800-321
479
749+832
1581
8x4
5x8
40
9x6
54
7x7
4x3
12
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