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

3438 # 3865 # 956 # 3020 @ 2696
-1707

16 @ 4157 @ 3953 @ 8863
16989

4469 # 2074 # 4368 @ 4799 @ 6797 @ 9995 # 5146 # 2201

12271