10-5 = ?, 5, 6, 8, 9, 8-3 = ?, 6, 8, 5, 4, 6-3 = ?, 3, 7, 5, 4, 6-4 = ?, 5, 3, 1, 2, 5-1 = ?, 3, 6, 4, 2.

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