Function: gradient[1](sum(log(numbers("yxx"), numbers("xxy")) if numbers("xxy") if numbers('rep') > log(numbers("yxx"), numbers("xxy")) else numbers("yxx") if numbers("xxy") > numbers("yxx") else log(numbers("yxx"), numbers("xxy")) > numbers("yxx") if numbers('rep') > log(numbers("yxx"), numbers("xxy")) else numbers("xxy") else numbers("yxx"), numbers("yxx") if log(numbers("yxx"), numbers("xxy")) > numbers("xxy") else numbers("yxx") if log(numbers("yxx"), numbers("xxy")) > numbers("xxy") else numbers('rep')))