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:
3909 - 4736 + 2593 + 3592
answer:
2460


question:
9085 + 2845 - 6159 + 1404 + 2110 - 8797
answer:
17682


question:
1638 - 6853 - 4091 + 6984 + 155 + 8970 - 6601
answer:

3074