import java.util.Scanner;


public class Main{
 	
  	public static void main(String args[]){
     	Scanner sc=new Scanner(System.in);
      	int i=sc.nextInt();
      	int ans=i+(i*i)+(i*i*i);
      	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