28 + 5 =
23 + 6 =
19 + 7 =
15 + 6 =
28 + 9 =
34 - 8 =
40 - 21 =
25 - 13 =
31 - 9 =
16 - 12 =
19 + 21 =
23 + 11 =
14 + 12 =
7 + 23 =
26 + 8 =
41 - 18 =
23 - 9 =
24 - 16 =
40 - 21 =
18 - 11 =

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