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: 4899 + 5775 - 8386 + 4273

Output: 3237


Input: Consider Input: 5125 - 607 + 8597 + 4804 + 5962 - 7812 - 176 - 9436 + 6198

Output: -2405


Input: Consider Input: 1097 + 3008 + 4127


Output: -6038