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.

Input: Consider Input: 8135 - 2883 + 7793 - 4176

Output: 7401


Input: Consider Input: 6844 + 1340 - 4174 - 5664 + 4911 - 5241

Output: 15672


Input: Consider Input: 4929 + 8906 - 927


Output: -3050