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: 2596 + 8164 - 6385 + 6704

Output: -5887


Input: Consider Input: 6091 - 9741 + 8943 + 4033 - 2984 + 4984 + 8503

Output: -7647


Input: Consider Input: 6571 - 6605 - 7397 - 1536 - 2560 - 4246 + 796 + 7856 - 6387


Output: 26650