TASK DEFINITION: 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
PROBLEM: 331 # 9967 @ 21 @ 480 # 3926 @ 8770 @ 5909 @ 6288 # 1226

SOLUTION: 6680

PROBLEM: 2989 # 6833 # 4298 @ 8863 # 8408

SOLUTION: -7687

PROBLEM: 1953 @ 4134 @ 3828 # 7809 # 3780 # 200

SOLUTION:
-1874