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