5/9
7/10
5/7
1/9 + 2/9
7/9
2/4 + 1/4
1/2 + 1/2
3/9 + 2/9
4/10 - 1/10
3/10
2/4
5/7 - 2/7
3/4
3/7
8/9 - 1/9
1
3/9
9/10 - 2/10
4/7 + 1/7
1 - 2/4