9/2 - 19/7 =
15/14
5/2+ 19/7=
83/14
7/3 - 4/5 =
23/15
17/3+ 1/7=
122/21
13/5- 5/3=
14/15
5/6+ 8/3=
63/18
23/9 - 4/3 =
33/27
1/5 + 2/4
14/20
15/4 - 1/5 =
71/20
2/7+ 2/8=
30/48
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