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:
2603 + 1868 - 4242
answer:
4977


question:
1078 + 2128 + 513 + 5898 - 8020
answer:
559


question:
3334 - 6470 + 4908 + 602
answer:

4294