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: 9467 + 7102 - 1964
Example Output: 4329

Example Input: 9776 + 5760 + 5961 - 1401 - 1368
Example Output: 824

Example Input: 6887 + 8828 + 9168 - 4229
Example Output:
-6880