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

931 # 9775 @ 8414
-430

3438 # 3865 # 956 # 3020 @ 2696
-1707

3733 # 7221 # 8571 # 7139

-19198