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: 8338 + 7035 - 2067 - 1210 + 9433 + 1604
Example Output: -6457

Example Input: 6567 + 2835 + 6725
Example Output: -2993

Example Input: 490 + 5592 - 8888 - 4789 + 7498 + 3654 - 765
Example Output:
-1812