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: 5 + 3
Example output: 2
Example explanation: Here, '+' represents subtraction operation. So, the answer is 2 (5-3=2).
Q: 1568 + 7367 + 3684 - 6991 - 7410 + 5828
A:
-910