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: 5992 @ 7637 # 7427 @ 1102 @ 677 @ 9685 @ 6972

SOLUTION: 24638

PROBLEM: 4156 @ 1684 # 3821 # 8658 @ 9620 @ 7904 @ 977

SOLUTION:
11862