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
--------
Question: 7640 @ 3347 @ 904

Answer: 11891


Question: 9938 # 267 # 6696 # 8186 # 5729 # 8517 # 6331 @ 7607

Answer: -18181


Question: 6597 @ 1596 # 358 # 9057 @ 993

Answer:
-229