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
--------
Question: 9720 @ 6485 @ 1745 @ 728

Answer: 18678


Question: 4956 # 4259 # 3459

Answer: -2762


Question: 3975 @ 2855 @ 684 # 7544 # 8903 @ 149

Answer:
-8784