1) (5/6 - 11/14) : 3/7 = (35/42 - 33/42) : 3/7 = 2/42 : 3/7 = (2/42) * (7/3) = 14/126 = 7/63
2) 16 : 1(11/13) - 1(1/4) : 15/58 = 16 / (1(11/13)) - (1(1/4)) / (15/58) = 16 / (26/13) - (5/4) / (15/58) = 16 / 2 - (5/4) * (58/15) = 8 - (145/60) = 8 - 29/12 = 83/12
3) (8 - 1(3/13) : 1(17/39)) : 5(5/14) = (8 - 16/13) : (39/39 + 17/39) : 5(5/14) = (104/13 - 16/13) / (56/39) : 5(5/14) = (88/13) / (8/39) : (71/14) = (88/13) (39/8) : (71/14) = (429/13) : (71/14) = (429/13) (14/71) = 6/13
1) (5/6 - 11/14) : 3/7 = (35/42 - 33/42) : 3/7 = 2/42 : 3/7 = (2/42) * (7/3) = 14/126 = 7/63
2) 16 : 1(11/13) - 1(1/4) : 15/58 = 16 / (1(11/13)) - (1(1/4)) / (15/58) = 16 / (26/13) - (5/4) / (15/58) = 16 / 2 - (5/4) * (58/15) = 8 - (145/60) = 8 - 29/12 = 83/12
3) (8 - 1(3/13) : 1(17/39)) : 5(5/14) = (8 - 16/13) : (39/39 + 17/39) : 5(5/14) = (104/13 - 16/13) / (56/39) : 5(5/14) = (88/13) / (8/39) : (71/14) = (88/13) (39/8) : (71/14) = (429/13) : (71/14) = (429/13) (14/71) = 6/13