Function: divide(cos(mean(minus(numbers('epe') if numbers('epe') > numbers('xry') else product(numbers('epe'), numbers('xry')), product(numbers('epe'), numbers('xry'))), numbers('epe') if numbers('xry') > product(numbers('epe'), numbers('xry')) else numbers('epe'))), mean(minus(numbers('xry') if numbers('epe') > numbers('epe') else product(numbers('epe'), numbers('xry')), product(numbers('epe'), numbers('xry'))), product(numbers('epe'), numbers('xry')) if numbers('epe') > numbers('xry') else numbers('epe')))