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: 6800 + 2564 + 8444 + 1912

Output: -6120


Input: Consider Input: 5753 - 4358 + 6312 + 2406 + 5334 - 4718 + 6262

Output: -5485


Input: Consider Input: 4540 + 2439 + 9647 + 9211 + 1991 + 7125 + 6667


Output: -32540