Помогите пожалуйста решить

Пошаговое объяснение:

3/4 + 5/7 = 21/28 + 20/28 = 41/28 = 1. 13/28

3/5 - 2/7 = 21/35 - 10/35 = 11/35

3/5 + 1/4 = 12/20 + 5/20 = 17/20

7/1 - 2/5 = 35/5 - 2/5 = 33/5 = 6. 3/5

5/12 + 3/16 = 20/48 + 9/48 = 29/48

5/18 - 2/27 = 15/54 - 4/54 = 11/54

5/32 + 5/48 = 15/96 + 10/96 = 25/96

7/30 - 8/45 = 21/90 - 16/90 = 5/90 = 1/18

2/33 + 3/22 = 6/66 + 9/66 = 15/66 = 5/22

Можно лучший?