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: 9493 + 2402 - 721 + 5448 + 2919
Example Output: -555

Example Input: 8739 - 8064 - 7000 + 6709
Example Output: 17094

Example Input: 9529 + 3823 + 4744 - 9208
Example Output:
10170