Первая дробь больше:

33/35 < 57/59 (57/59 > 0.966, 33/35 = 0.943)

5/6 < 13/15 (13/15 > 0.866, 5/6 = 0.833)

12/17 < 35/51 (35/51 > 0.686, 12/17 = 0.706)

17/42 < 13/14 (13/14 > 0.928, 17/42 = 0.405)