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:
9096 - 7913 + 7375 + 7790

Ex Output:
1844


Ex Input:
4117 - 3380 - 4784

Ex Output:
12281


Ex Input:
488 + 6011 - 8975 + 8696

Ex Output:

-5244