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.

8338 + 7035 - 2067 - 1210 + 9433 + 1604
-6457

8571 - 5985 + 8912
5644

8198 + 1518 + 1568 - 6805

11917