/*
------------------------------|بسم الله الرحمن الرحيم|------------------------------//
------------"IN THE NAME OF ALLAH, THE MOST GRACIUOS, THE MOST MERCIFUL"-------------//
__________________________________ShahnawazShaikh_____________________________________
*/
import java.io.*;
import java.util.*;
public class Main{
	public static void main(String[] x) throws java.lang.Exception{
	Scanner sc=new Scanner(System.in);
    short a=sc.nextShort();
    System.out.println(a+a*a+a*a*a);
	

	}

}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz