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.

[EX Q]: 1231 + 6657 - 8263
[EX A]: 2837

[EX Q]: 7337 + 5801 - 8640 - 4143 - 2557
[EX A]: 16876

[EX Q]: 1021 + 4746 - 1557
[EX A]:
-2168