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: 9096 - 7913 + 7375 + 7790

Output: 1844


Input: Consider Input: 2443 + 7109 + 4711

Output: -9377


Input: Consider Input: 4601 - 8938 + 4215 + 9896


Output: -572