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: 5292 + 3623 + 7450

Output: -5781


Input: Consider Input: 5989 - 6394 + 3845 + 1679 - 5682 + 8226 - 674 - 1284

Output: 6273


Input: Consider Input: 9889 + 8457 - 4692


Output: 6124