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:
4291 + 2761 - 4339 + 8922

Ex Output:
-3053


Ex Input:
5125 - 607 + 8597 + 4804 + 5962 - 7812 - 176 - 9436 + 6198

Ex Output:
-2405


Ex Input:
5375 + 5786 - 7033

Ex Output:

6622