12/3 + 7/3
3/4
(5/2)(9/3)
45/6
(3/5)(1/2)
2/7 + 15/21
81/20
(6/5)(2/9)
(9/5) / (4/9)
9/4-6/4
19/3
60/24
4/3
43/35
3/10
1
15/8 / 3/4
5/3 - 1/3
3/7 + 4/5
12/45
