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: 7409 + 7579 + 4759 + 5088
Example Output: -10017

Example Input: 1123 - 8657 + 3476 - 5278 + 717 - 1557 + 6614 + 1549
Example Output: 4259

Example Input: 3009 - 3739 - 7487 + 208
Example Output:
14027