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

2678 # 5467 @ 8355 # 3124 # 5654
-3212

5031 # 649 # 8975 @ 1853 # 5257 # 1383
-9380

3999 # 8500 # 373 @ 8721 # 7747

-3900