
import java.util.*;


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