Function: gradient[1](sum(numbers("xxy"), numbers('rep')) if logn(band pass(sum(numbers("xxy"), numbers('rep')))) > numbers("xxy") else band pass(sum(numbers("xxy"), numbers('rep'))) if logn(band pass(sum(numbers("xxy"), numbers('rep')))) > band pass(sum(numbers("xxy"), numbers('rep'))) else sum(numbers("xxy"), numbers('rep')))
