12 and 1 / 3 of 3 / 4 of 3 / 14 of 5 / 16 of 7 * 2 and 2 / 3 + 1 / 7 = how much

Original formula = 12 1 / 3-15 / 3 / 5 / 14 · 7 / 2 + 1 / 7 = 12 10 / 21-4 = 8 10 / 21

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