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:
9748 + 7907 + 7494 - 2074 + 9313

Ex Output:
-12892


Ex Input:
1260 + 6532 + 3162 + 7255

Ex Output:
-15689


Ex Input:
5784 + 6853 - 7635 + 489 - 1466 + 5893 - 5312

Ex Output:

6962