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


question:
8171 + 8357 + 171 - 3129 - 6929
answer:
9701


question:
285 - 7569 - 4644
answer:

12498