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

[Q]: 2377 @ 4500 # 8359 @ 9946 # 9011
[A]: -547


[Q]: 1162 @ 622 # 7209 @ 3448
[A]: -1977


[Q]: 4930 # 4285 @ 8456 @ 613 @ 220
[A]:
9934