5/3 - 4/3
6/12 - 3/12
3 x 5/6
2 x 4/5
1/10 + 4/10 + 5/10
3/8 +2/8 + 1/8
3/9 + 5/9
4 x 2/7
4/7 -1/7
7/8 - 5/8
3/12
8/9
8/7
1
8/5
2/8
1/3
6/8
3/7
15/6
