10 + 7 - 12 + 5 = 17, 10 + 3 - 4 + 9 = 13, 10 + 6 - 9 + 7 = 16, 10 + 5 - 7 + 8 = 15, 10 + 4 - 8 + 6 = 14, 10 + 2 - 6 + 6 = 12, 10 + 1 - 9 + 2 = 11, 10 + 8 - 13 + 5 = 18, 10 + 9 - 17 + 2 = 19, 10 + 10 - 12 + 8 = 20,

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