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:
3421 - 71 + 7643 - 8661 + 520 - 6536 + 9411
answer:
1115


question:
2474 + 4117 - 310 - 2018 - 6488 - 3458 - 1404
answer:
12035


question:
4764 - 9568 - 9176 - 6920 + 4095 - 1205 + 6777 - 1671
answer:

22432