53,5-14 1/6×1 1/17+8 2/3
53,5 - 14 1/6 * 1 1/17 + 8 2/3 = 53,5 - 85/6 * 18/17 + 8 2/3 = 53 1/2 - 15 + 8 2/3 = 53 3/6 - 15 + 8 4/6 = 76 7/6 = 77 1/6