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: 4533 - 9566 - 2287 + 4647 + 5056 + 6340 + 777 - 4673 + 2170
Example Output: 2069

Example Input: 1784 - 9730 - 6578 + 4783 + 5639 + 3169 + 7930 + 1879
Example Output:
-5308