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:
6738 - 471 + 8724
answer:
-1515


question:
7427 + 8795 - 4104 + 7720 - 6667
answer:
1683


question:
4491 - 5723 + 8093
answer:

2121