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

3816 @ 8163 # 9273 @ 2037 @ 8051 @ 826
13620

473 # 2568 @ 9771 # 2525 @ 3277 @ 261 # 8230 @ 6021
6480

1613 # 5413 # 5074 # 3273

-12147