import java.util.*;
public class Main
{
	public static void main(String[] args)
	{
	  Scanner s=new Scanner(System.in);
	  int t=s.nextInt();
	  int ans=t+(t*t)+(t*t*t);
	  System.out.println(ans);
	}
}
/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