3/5 - 7/10
7/8 - 3/10
5/6 - 2/3
3/4 + 7/2
1/2 + 1/4
5/8 + 2/8
4/5 + 2/3
11/24 - 17/36
2/9 + 3/8
3/4 - 1/6
R = - 1 / 72
R = 43 / 72
R = 22 / 15
R = 1 / 6
R = - 1 / 10
R = 3 / 4
R = 23 / 40
R = 7 / 12
R = 7 / 8
R = 17 / 4
