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: 6284 + 1234 + 9639 + 1470 + 4137 + 9445 + 5309 + 9797 - 4507

Output: -30240


Input: Consider Input: 2837 + 8737 + 9015 - 7647 - 1903 - 3427 - 2034 - 3680 - 8565

Output: 12341


Input: Consider Input: 4600 - 1286 + 4983 + 1010 - 3622 + 6644 - 3329 + 9753 - 2265


Output: -7288