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: 4226 - 3951 + 2613

Output: 5564


Input: Consider Input: 8341 + 2746 - 2959 - 9678 + 5173 + 317

Output: 12742


Input: Consider Input: 6028 + 3919 - 3527 - 9243 + 7522


Output: 7357