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: 138 + 3973 - 6085 - 3324 + 6921 + 4411 + 1113 + 8310
Example Output: -15181

Example Input: 2349 - 9730 - 8231 + 6983 + 9097 + 6965 - 2760
Example Output: 25

Example Input: 6180 + 3585 - 8411 - 3860 - 4284 - 9281 - 3030
Example Output:
31461