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: 4700 + 6640 + 3352 - 3114 - 7674 - 8204 + 8654 + 8091 - 2969

Output: -76


Input: Consider Input: 9990 - 8613 - 152 + 4529

Output: 14226


Input: Consider Input: 5291 + 9061 - 4967 - 4009


Output: 5206