4 + 7
12
11
-11
11 - 4
9
7
13
-7 + 2
5
-5
(+8) + (+3)
+11
+10
(-9) + (-2)
+13
-7
(+11) - (+5)
+16
-16
+6
5+7-3
-9
8
12-4-6
0
2
10
18-(5+4)
6
25-[8-(12-15)]
32
23
14