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]: 8899 # 4509 # 9411 # 7373
[A]: -12394


[Q]: 5038 @ 8417 @ 7931 @ 7414 @ 5627 # 6512 # 5503
[A]: 22412


[Q]: 3972 @ 5077 # 4036 # 5163 @ 7280 # 5290
[A]:
1840