import java.util.*;
import java.io.*;
class Main{
  public static void main(String[] args){
    try{
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      int a = Integer.parseInt(br.readLine());
      int ans = a + (int)Math.pow(a,2) + (int)Math.pow(a,3);
      System.out.println(ans);
    }catch(IOException e){
       System.out.println(e);
    }
  }
}
/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