import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner s = new Scanner(System.in);
		int ans = 0;
		int in = s.nextInt();
		ans = in+(int)Math.pow(in,2)+(int)Math.pow(in,3);
		System.out.print(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