In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

8155 + 6800 - 6839 - 8047 + 3270
12971

2500 + 3268 - 574 + 5695 - 2143 + 404 - 196
-3954

3313 + 1125 + 3199 + 2327 + 1728 + 3494 + 2696

-11256