Function: square(gradient[1](invert(numbers('epe')) if numbers('epe') if numbers('xyy') > numbers('yxr') else invert(numbers('epe')) > invert(numbers('epe')) if numbers('yxr') if invert(numbers('epe')) > numbers('epe') else numbers('xyy') > numbers('epe') else numbers('xyy') else numbers('epe') if invert(numbers('epe')) > numbers('xyy') else numbers('yxr') if numbers('epe') > numbers('xyy') if invert(numbers('epe')) > numbers('yxr') else numbers('epe') if invert(numbers('epe')) > numbers('epe') else numbers('xyy') else invert(numbers('epe'))))
