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: 7221 @ 968 # 4557 # 3859 # 2371 # 4621 # 7926
A: 
-15145