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:
5321 - 5114 + 7476 + 1962

Ex Output:
997


Ex Input:
1471 + 6113 + 3177 - 2507 - 2358 + 6654

Ex Output:
-9608


Ex Input:
9242 - 8638 + 7422 + 6513

Ex Output:

3945