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.

8602 - 1293 - 8063 - 4529 + 453 - 6407
28441

5773 - 2989 + 8993 + 6702 + 2237 - 1402 - 4236 - 1857
-1675

4904 + 3325 - 7798 - 784 + 6389 - 2835 + 9679

-3072