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.

812 + 6106 - 2904 + 7738 + 7655 - 6987
-10796

8135 - 2883 + 7793 - 4176
7401

642 - 7863 + 855 + 3909 + 4474 - 9340 - 6976 - 7034 + 2816

19801