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: 4291 + 2761 - 4339 + 8922

Output: -3053


Input: Consider Input: 6063 + 9874 + 5939 - 5013 + 791

Output: -5528


Input: Consider Input: 7724 - 7887 - 2059 - 78 + 6356 - 6027 + 8376


Output: 9043