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: 2994 # 4380 @ 6720

SOLUTION: 5334

PROBLEM: 3303 @ 1775 # 9738 @ 1433 @ 5484 @ 2221

SOLUTION: 4478

PROBLEM: 4913 @ 1099 @ 4463 @ 5165 @ 5527

SOLUTION:
21167