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: 146 - 5209 + 892
Example Output: 4463

Example Input: 1470 + 1395 + 3788 + 7517 + 2388 - 431 - 2393 + 4241 - 560
Example Output: -14475

Example Input: 485 + 3169 - 6408 - 5976
Example Output:
9700