Function: minus(minus(numbers("xxy"), numbers('xyy')) if round(gradient[2](minus(numbers("xxy"), numbers('xyy'))), minus(numbers("xxy"), numbers('xyy'))) > numbers("xxy") else gradient[2](minus(numbers("xxy"), numbers('xyy'))), round(gradient[2](minus(numbers("xxy"), numbers('xyy'))), minus(numbers("xxy"), numbers('xyy'))))