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= 5 7/28 - 16/28 - 30/7 * 3/10 + 65/8 * 16/13=
= 4 19/28 - 1 2/7 + 10 = 4 19/28 - 1 8/28 + 10=
= 3 11/28 + 10 = 13 11/28