Function: product(log(gradient[1](numbers("per") if numbers("per") if mean(numbers("per"), numbers("yxx")) > numbers('yxr') else numbers("yxx") > numbers("yxx") else mean(numbers("per"), numbers("yxx"))), mean(numbers("per"), numbers("yxx")) if numbers('yxr') > numbers("per") else numbers("yxx") if mean(numbers("per"), numbers("yxx")) > numbers("per") else numbers("yxx")), gradient[1](numbers("per") if numbers("yxx") if numbers("per") > mean(numbers("per"), numbers("yxx")) else numbers('yxr') > numbers("yxx") else mean(numbers("per"), numbers("yxx"))))
