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: 1344 + 7632 - 4322

Output: -1966


Input: Consider Input: 2862 - 964 + 1644

Output: 2182


Input: Consider Input: 6362 - 7931 - 7350 + 154 - 7097


Output: 28586