Function: log(invert(gradient[2](numbers("xxr") if minus(numbers("xxr"), numbers('yyx')) > numbers("xxr") if numbers('yyx') > numbers('rep') else minus(numbers("xxr"), numbers('yyx')) else numbers('yyx'))), gradient[2](numbers("xxr") if numbers('rep') > minus(numbers("xxr"), numbers('yyx')) else numbers('yyx') if numbers("xxr") > numbers('yyx') else minus(numbers("xxr"), numbers('yyx'))))
