30 + 29 = - 59, 40 + 15 = - 55, 82 + 8 = - 90, 90 +11 = - 101, 36 + 14 = - 50, 80 + 20 = - 100, 70 + 35 = - 105, 23 + 20 = - 43, 60 + 20 = - 80, 30 + 30 = - 60, 90 - 20 = - 70, 15 - 5 = - 10, 50 - 20 = - 30, 80 - 60 = - 20, 100 - 60 = - 40, 26 - 3 = - 23, 30 - 2 = - 28, 95 -10 = - 85, 80 - 3 = - 77, 120 - 10 = - 110, 50 - 4 = - 46, 100 - 1 = - 99, 32 + 33 = - 65, 20 + 21 = - 41,
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