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: 4226 - 3951 + 2613
Example Output: 5564

Example Input: 4291 + 2761 - 4339 + 8922
Example Output: -3053

Example Input: 5817 - 5207 - 6536 + 7061 - 8613 + 4916 + 8209
Example Output:
5987