5-2x2/4
10/5-1
10/(5-1x4)
-1+2-3x4-5+6-7+8
(3x5)-(8+2)
1-2+3x4+5-6+7-8
3x5-8+1
17-3x(5-2)
6
5
1
9
-9
10
4
8
