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:
7344 + 9206 + 3989 + 5648 - 7620

Ex Output:
-3879


Ex Input:
1471 - 7798 + 6514 + 8053 + 9926

Ex Output:
-15224


Ex Input:
6226 + 5426 + 253 + 3411 + 6592 - 5556 + 1296 - 691 - 9762

Ex Output:

5257