Serguei Takmakov
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4 3/16 - 10/16 = 67/16 - 10/16 =57/16 = 3 9/16
6 4/9 - 3 6/7 = 58/9 - 27/7 = 406/63 - 243/63= 163/63 = 2 37/63
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4 3/16 - 10/16 = 67/16 - 10/16 =57/16 = 3 9/16
6 4/9 - 3 6/7 = 58/9 - 27/7 = 406/63 - 243/63= 163/63 = 2 37/63