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:
6091 - 9741 + 8943 + 4033 - 2984 + 4984 + 8503

Ex Output:
-7647


Ex Input:
1930 - 7631 - 6614 + 5805 + 7376

Ex Output:
2994


Ex Input:
4720 - 7543 + 3750 + 6137 + 9215 + 1845

Ex Output:

-8684