import java.util.*;
import java.io.*;
class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int A = Integer.parseInt(sc.next());
    PrintWriter out = new PrintWriter(System.out);
    out.print((int)(A + Math.pow(A,2)+ Math.pow(A,3)));
    out.flush();
  }
}
/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