import java.io.*;
import java.util.*;
import java.lang.*;

public class Main
{
	public static void main(String args[]) throws java.lang.Exception,FileNotFoundException
	{
		Scanner sc = new Scanner(System.in);


		int a = sc.nextInt();

		int res = a + a*a + a*a*a;

		System.out.println(res);

		sc.close();
		System.out.flush();
	}
}
/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