Function: 2 *(minus(numbers('xyy'), numbers('yxr'))) if minus(numbers('xyy'), numbers('yxr')) > numbers('yxr') else numbers('xyy') if minus(numbers('xyy'), numbers('yxr')) > 2 *(minus(numbers('xyy'), numbers('yxr'))) else gradient[0](numbers('yxr') if minus(numbers('xyy'), numbers('yxr')) > 2 *(minus(numbers('xyy'), numbers('yxr'))) else numbers('xyy'))