Function: gradient[2](minus(sum(log(numbers('yyx') if exp(numbers('yyx'), numbers('xry')) > numbers("yxx") else numbers('xry'), exp(numbers('yyx'), numbers('xry'))), numbers('yyx') if numbers('xry') > exp(numbers('yyx'), numbers('xry')) else numbers("yxx")), log(numbers("yxx") if numbers('yyx') > numbers('xry') else exp(numbers('yyx'), numbers('xry')), exp(numbers('yyx'), numbers('xry')))))
