Function: mean(square(numbers('ryy')) if numbers("yxx") > numbers('ryy') else numbers('ryy') if square(numbers("yxx") if numbers('ryy') > square(numbers('ryy')) else numbers('ryy')) > square(numbers('ryy')) else numbers('ryy'), square(numbers('ryy') if square(numbers('ryy')) > numbers('ryy') else numbers("yxx")))
