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

1559 # 9981 # 6881
-15303

5046 # 9480 # 3079 @ 8929 # 1334 # 6211 @ 3240 @ 3825
936

4678 @ 9798 @ 3904

18380