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.

Example Input: 4899 + 5775 - 8386 + 4273
Example Output: 3237

Example Input: 812 + 6106 - 2904 + 7738 + 7655 - 6987
Example Output: -10796

Example Input: 1332 - 7171 - 9142 + 3222 + 5250 + 339 - 806 + 1084 + 1398
Example Output:
7158

