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.

6800 + 2564 + 8444 + 1912
-6120

318 - 2977 - 9352 - 3082 - 5224 + 3028 - 7022
24947

815 + 7862 - 6166

-881