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:
8247 - 6987 - 8915 - 9962
answer:
34111


question:
9491 + 8647 - 4571 + 8815 - 4816 - 8552 + 1794
answer:
8174


question:
3429 - 2136 - 7239 + 3478 - 6328 - 2859 - 7526 - 8903 + 1522
answer:

33420