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:
7525 + 263 - 1634 + 3644 + 6905 - 167

Ex Output:
-1486


Ex Input:
7025 + 6005 + 6548 - 4628

Ex Output:
-900


Ex Input:
2996 + 851 - 3774 + 3934 + 8711

Ex Output:

-6726