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: 4291 + 2761 - 4339 + 8922

Output: -3053


Input: Consider Input: 6703 - 9786 + 9954 + 2764 - 215 - 4197 + 7852 - 2961 - 9816


Output: 13108