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

6571 # 6605 # 7397 # 1536 # 2560 # 4246 @ 796 @ 7856 # 6387
-13508