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

9467 + 7102 - 1964
4329

833 - 1959 - 256 + 2566 + 2914 + 6760 - 6415 - 7443 - 9248

13914