2 + 4 - 6, 7 + 1 - 8, 3 + 4 - 7, 1 + 2 - 3, 4 + 5 - 9, 1 + 1 - 2, 6 - 1 - 5, 10 - 9 - 1, 8 - 4 - 4, 15 - 5 - 10,

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