import java.util.*;
import java.lang.*;
import java.io.*;
class Main
{
    public static void main(String args[])throws IOException
    {
        Scanner obj=new Scanner(System.in);
        int a=obj.nextInt();
        int s=a+(a*a)+(a*a*a);
        System.out.println(s);
    }
}
/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