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: 6570 + 2902 + 9219 - 6971 + 6886 + 765
Example Output: -6231

Example Input: 4117 - 7011 - 9534 - 3901 - 9537 + 6979
Example Output: 27121

Example Input: 1401 - 9837 + 8140 + 1046 + 2383 - 4793 + 2520 + 7885
Example Output:
-5943