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: 1559 # 9981 # 6881

SOLUTION: -15303

PROBLEM: 2065 @ 3769 @ 9915 # 6270 @ 3929 @ 5328 @ 6079 @ 5250 @ 843

SOLUTION: 30908

PROBLEM: 691 # 47 @ 2512 # 8883 @ 4699 @ 4099 # 8958 # 7540 # 8208

SOLUTION:
-21635