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: 8899 # 4509 # 9411 # 7373

SOLUTION: -12394

PROBLEM: 7944 # 4957 # 8255 @ 684

SOLUTION: -4584

PROBLEM: 6396 @ 7569 # 337 # 5302 @ 8456 @ 4916 # 8707

SOLUTION:
12991

