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:
4486 + 7884 - 172 + 2615

Ex Output:
-5841


Ex Input:
2342 + 4498 - 5816 + 2604 - 6155 - 2683 - 1893 - 2482

Ex Output:
14269


Ex Input:
9204 - 3856 - 1350 + 2123 - 6538 + 2530 + 9193

Ex Output:

7102