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:
7555 + 8285 + 7132 + 9363 - 3515

Ex Output:
-13710


Ex Input:
8135 - 2883 + 7793 - 4176

Ex Output:
7401


Ex Input:
5552 + 7033 + 4158 + 5707 - 2329 + 725 + 6919 + 9462 + 11

Ex Output:

-26134