(9 - 3) / 2 =
15
3
2 x 3 - 1
21
5
8 / 2 x 3
7 + 2 x 4
11
(3 + 5) / 2
3 x 6 / 2
2 x 7 - 3
12
3 x 14 / 2
16
4
10
2 x (3 + 5)
2 x (8 - 3)
9