23+12=35
15+19=34
-24+11=-13
-32+12=-20
43-15=28
-36+63=27
-16-51=-67
-41-37=-78
35
34
-13
-20
28
27
-67
-78
23+12=35
15+19=34
-24+11=-13
-32+12=-20
43-15=28
-36+63=27
-16-51=-67
-41-37=-78
35
34
-13
-20
28
27
-67
-78