Add
2/7+4/7
6/7
8/12-3/12
5/12
2/5 xx 5/2
1
3/4 / 5/4
3/5
20/4
5
4/7+3/14
11/14
7/9-8/27
13/27
12/4 (1/3)
1
1/2 / 4/5
5/8
21/9
7/3
-2(5/2+3/2)
-8
3/5+(-1/4)
7/20
(2/3)(15/7)
10/7
6 / (2/5
15
(4(3))/(2-1)
1/2(2/3+1/6)
5/12
4/5(-5/4+3/5)
-13/25
7/9 (8/5)
56/45
12/(17/19)
228/17
-3(2/5)+1
-1/5
9 10/20 + 1 2/4
11
9 1/5-1 6/10
7 3/5 or 38/5
3 2/3 xx 4 1/5
15 2/5 or 77/5
(3/5)/7
3/35
(6(5+3/2))/(1/2
78