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.

4397 - 3478 - 9837 - 7164 + 7972 + 3676
13228

8398 - 1163 + 8396 + 4440 + 9289
-12564

4666 + 6849 + 3778 + 4971 - 5641 - 7807

2516