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.

Q: 2759 - 7972 - 7615 + 151

A: 18195
****
Q: 9493 + 2402 - 721 + 5448 + 2919

A: -555
****
Q: 3471 - 9156 + 7648 + 8147

A:
-3168
****