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.

7930 - 2835 - 1925 - 6613
19303

5661 + 5694 + 8212 - 8431 - 6340 + 4336 + 2022 - 5623
5791

714 + 2768 - 510 - 502 - 785 + 278

-535