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: 9634 + 5896 + 2965 + 6949 - 2226 + 9649 - 3599 - 7110
Example Output: -2890

Example Input: 6390 + 4138 + 2478 - 2353 - 4642 - 2361 + 814 - 4203 + 3590
Example Output:
8929