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: 7344 + 9206 + 3989 + 5648 - 7620
Example Output: -3879

Example Input: 473 - 2568 + 9771 - 2525 + 3277 + 261 - 8230 + 6021
Example Output: -5534

Example Input: 9742 + 8792 - 8215 + 1924 + 4604 + 8362 - 4329
Example Output:
-1396