Function: mean(invert(sum(cos(numbers('ryy') if numbers('epe') > numbers('rep') else numbers('yxr')), numbers('yxr') if numbers('rep') > numbers('epe') else numbers('ryy'))), sum(cos(numbers('epe') if numbers('yxr') > numbers('ryy') else numbers('rep')), numbers('yxr') if numbers('ryy') > numbers('epe') else numbers('rep')))
