Function: mod(gradient[2](exp(mean(minus(max(numbers('yyx'), numbers('epe')), numbers('yyx')), max(numbers('yyx'), numbers('epe'))), minus(max(numbers('yyx'), numbers('epe')), numbers('yyx')))), exp(mean(minus(max(numbers('yyx'), numbers('epe')), numbers('yyx')), max(numbers('yyx'), numbers('epe'))), minus(max(numbers('yyx'), numbers('epe')), numbers('yyx'))))
