
import java.util.Scanner;

// Problema atcoder

public class Main {


	public static void main(String args[])  {
		
		String s;
		int n;
		
		
		
		Scanner input = new Scanner(System.in);
		
		n = input.nextInt();
		
		long total = n + (n*n) + (n*n*n);
		
		
	    input.close();
	    
		System.out.println( total);
	
}
}
















/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