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:
8737 - 2978 - 6717
answer:
18432


question:
1123 - 8657 + 3476 - 5278 + 717 - 1557 + 6614 + 1549
answer:
4259


question:
3840 - 6562 - 2850 - 8834 + 2468 + 9377
answer:

10241