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:
5474 + 1234 - 4461 - 3865 + 7635 + 830 + 5965 - 7856 + 523

Ex Output:
5469


Ex Input:
3844 - 5783 + 7487

Ex Output:
2140


Ex Input:
4679 + 8221 + 617 + 1518

Ex Output:

-5677