Function: log(mean(minus(numbers('yyx') if numbers("per") > numbers('yxr') if sqrt(numbers("per")) > numbers("per") else numbers('yyx') else sqrt(numbers("per")), numbers('yxr') if sqrt(numbers("per")) > numbers('yyx') else numbers("per")), numbers("per") if sqrt(numbers("per")) > numbers('yyx') else numbers("per") if numbers('yyx') > numbers('yxr') else sqrt(numbers("per"))), minus(sqrt(numbers("per")) if sqrt(numbers("per")) if numbers("per") > numbers('yxr') else numbers('yyx') > numbers("per") else numbers('yyx'), numbers("per") if sqrt(numbers("per")) > numbers('yxr') else numbers('yyx')))
