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: 4839 - 962 + 7552

Output: -1751


Input: Consider Input: 812 + 6106 - 2904 + 7738 + 7655 - 6987

Output: -10796


Input: Consider Input: 9551 + 4169 - 3026 + 616 - 5398 - 6695 - 5831 - 898 - 1255


Output: 27869