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