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: 3844 - 5783 + 7487

Output: 2140


Input: Consider Input: 298 + 1699 + 1367 + 5001

Output: -7769


Input: Consider Input: 1411 + 4537 + 4800 - 5588 + 8574


Output: -10912