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:
6800 + 2564 + 8444 + 1912

Ex Output:
-6120


Ex Input:
8071 + 4251 - 2253 - 9388

Ex Output:

15461