4+5 - 9, -2+7 - 5, 15-7 - 8, -6+9 - 3, 12-16 - -4, 10-20 - -10, -12+15 - 3, 30-30 - 0, -5+12 - 7, 12-5 - 7, 22-12 - 10, -22+10 - -12, 65-80 - -15, -8+17 - 9, -4-3 - -7, 3- -2 - 5, 12-20 - -8, 19-23 - -4, 205-300 - -95, -12+4 - -8, 11-12 - -1, 17-24 - -7, -6+12 - 6, 17-19 - -2, -16+11 - -5, 12-99 - -87, 23- -9 - 42, 21-25 - -4, 4-7 - -3, 10-50 - -40,

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