In this task you will be given an arithmetic operation and you have to find its answer. The operators '+' and '-' have been replaced with new symbols. Specifically, '+' has been replaced with the symbol '@' and '-' with the symbol '#'. You need to perform the operations in the given equation return the answer

Example input: 6 @ 17
Example output: 23
Example explanation: Here, '@' represents the addition operation. So, the answer is 23 (6+17=23).
Q: 8539 # 6592 # 7022 @ 9420 # 6659 @ 6795 # 4788
A:
-307