12 - 6 + 6 =, 10 - 5 + 5 =, 16 - 8 + 8 =, 8 - 4 + 4 =, 14 - 7 + 7=, 18 - 9 + 9 =, 2 - 1 + 1 =, 4 - 2 + 2 =, 6 - 3 + 3 =,

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