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:
8213 + 7145 + 5203 - 2621 + 1654 - 1844
answer:
-1324


question:
2131 + 4513 + 3760 - 9342 + 7779 + 4653 + 3111
answer:
-12343


question:
5557 - 5964 + 8125 - 4035
answer:

7431