instruction:
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.
question:
3438 - 3865 - 956 - 3020 + 2696
answer:
8583


question:
5539 + 616 - 1640 - 7665 - 8787 - 5104 + 8431 + 9502
answer:
10186


question:
872 + 547 - 4476 + 6631 - 8433 - 452 + 5115
answer:

1940