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: 6567 + 2835 + 6725
Example Output: -2993

Example Input: 6368 + 9565 - 7042 - 1940 - 9960
Example Output: 15745

Example Input: 1888 - 3019 - 8022 - 7991
Example Output:
20920