Для начала сократим дроби:
30/54 = 5/9
22/30 = 11/15
28/40 = 7/10
10/75 = 2/15
12/27 = 4/9
14/21 = 2/3
14/24 = 7/12
15/40 = 3/8
12/18 = 2/3
5/60 = 1/12
4/24 = 1/6
3/36 = 1/12

Теперь вычислим значение выражения:
5/9 + 11/15 = (55+113)/(95) = 56/45
7/10 - 2/15 = (73-22)/(103) = 19/30
4/9 + 2/3 = (43+29)/(93) = 14/9 = 1 5/9
7/12 - 3/8 = (72-33)/(122) = 11/24
2/3 - 1/12 = (24-11)/(34) = 7/12
1/6 + 1/12 = (12+11)/(62) = 3/6 = 1/2

Таким образом, значения выражений будут равны:
56/45, 19/30, 1 5/9, 11/24, 7/12, 1/2