Function: gradient[1](gradient[0](minus(numbers("yxx") if numbers('xry') > sum(numbers('xry'), numbers("yxx")) else numbers('ryy') if numbers('xry') > sum(numbers('xry'), numbers("yxx")) else numbers("yxx"), numbers('ryy') if sum(numbers('xry'), numbers("yxx")) > numbers('xry') else numbers("yxx"))))
