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: 1231 + 6657 - 8263

Output: 2837


Input: Consider Input: 2144 - 4158 + 4207

Output: 2095


Input: Consider Input: 8304 + 7446 + 1730 - 6099


Output: 5227