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56 + 22 =78

25 + 30 = 55

44 + 43 = 87

3 + 5 = 8

49 + 50 = 99

10 + 8 = 18

13 + 4 = 17

99 - 50 = 49

8 - 3 = 5

18 - 8 = 10

55 - 30 = 25

78 - 56 = 22

17 - 13 = 4

87 - 43 = 44