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: 7528 - 4788 + 7674 + 4839 + 6930 + 4883 + 9734

Output: -21744


Input: Consider Input: 2759 + 1013 - 5223 + 4409 - 667 + 3220 + 7884


Output: -7877