25 + 36 = - 61, 48+27= - 75, 19 + 42 = - 61, 63 + 15 = - 78, 31 + 49 = - 80, 54 + 18 = - 72, 12 + 67 = - 79, 40 + 32 = - 72, 28 + 45 = - 73, 33 + 21 = - 54, 89 - 25 = - 64, 72 - 38 = - 34, 63 - 19 = - 44, 57 - 23 = - 34, 90 - 47 = - 43, 84 - 56 = - 28, 66 - 32 = - 34, 55 - 17 = - 38, 70 - 28 = - 42, 48 - 29 = - 19,

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