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
Example: 6 @ 17
Example solution: 23
Example explanation: Here, '@' represents the addition operation. So, the answer is 23 (6+17=23).

Problem: 4809 # 9135 # 3011 # 4393 # 1039 # 3878 @ 1559 # 3798

Solution: -18886