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6 + 2 - 8, 3 + 7 - 10, 4 + 6 - 10, 7 + _ = 10 - 3, 2 + _ = 10 - 8, 6 + _ = 10 - 4, 10 + 2 - 12, 4 + 10 - 14, 10 + 3 - 13, 10 + 8  - 18,

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