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.

Example Input: 6284 + 1234 + 9639 + 1470 + 4137 + 9445 + 5309 + 9797 - 4507
Example Output: -30240

Example Input: 3672 + 2445 + 4715 - 5145 - 8515 + 3793 - 3753
Example Output: 10132

Example Input: 7937 + 7326 + 5613 - 7502 - 8559 + 6857 + 2857 - 2397
Example Output:
3742