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.

Ex Input:
6054 - 4121 + 5615

Ex Output:
4560


Ex Input:
8294 + 6661 + 4555 + 6171

Ex Output:
-9093


Ex Input:
9806 + 9324 + 9847

Ex Output:

-9365