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

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