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: 2020 @ 862 # 5780

SOLUTION: -2898

PROBLEM: 6704 @ 69 @ 617 @ 7950 # 7615 @ 9447 # 8908

SOLUTION: 8264

PROBLEM: 9965 # 1220 @ 2931 @ 8586

SOLUTION:
20262