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: 8974 + 8978 - 8097
Example Output: 8093

Example Input: 4101 + 2536 - 502
Example Output: 2067

Example Input: 3351 + 69 + 115 + 6704 + 5053
Example Output:
-8590