Function: square(gradient[2](numbers('xyy') if minus(numbers('xyy'), numbers("yxx")) > gradient[0](numbers("yxx") if minus(numbers('xyy'), numbers("yxx")) > numbers('xyy') else numbers("yxx")) else numbers('xyy') if numbers("yxx") > numbers("yxx") else minus(numbers('xyy'), numbers("yxx"))))
