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: 8213 + 7145 + 5203 - 2621 + 1654 - 1844
Example Output: -1324

Example Input: 5355 + 1451 - 3895 + 6213 + 743
Example Output: 843

Example Input: 7321 + 480 - 3203
Example Output:
10044