2/3 + 1/2
7/6
3 1/4 - 2 3/4
1 1/2
1/3 + 1/4
7/12
2/4 - 2/5
2/20
12 4/7 + 3 3/7
16
6/11- 1/11
5/11
3/4 - 2/3
1/12
2 1/3 - 2/3
2 2/3
7 4/5 + 3 5/10
11 3/10
14 1/5
- 4 2/3
9 8/15
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