13-2×5+9=
5+[7-2-(9-7)-2+12]-4=
8×2-(5-2)=
7+3×9-8=
28-[21-(12-3)-7]=
40 - [ 30 + 6 + ( 19 - 12 ) - 22] =
14-3×2+√9=
{2 + [3 + 5 × (3 + 4)]} +2 × 6 =
20-4×5+1=
8-2×5-2=
23
19
11
52
26
13
-4
14
12
1
