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:
146 - 5209 + 892
answer:
4463


question:
2510 - 5839 + 9950 + 740
answer:
-2341


question:
8907 + 3698 + 7662 - 6143
answer:

3690