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: 4787 # 6151 # 6235

SOLUTION: -7599

PROBLEM: 2367 @ 4877 @ 8467 @ 5488 # 987 # 8899

SOLUTION: 11313

PROBLEM: 7764 @ 4681 # 7305 @ 8498

SOLUTION:
13638