import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;

/**
 * A https://atcoder.jp/contests/abc172/tasks/abc172_a
 * 
 */
public class Main {
    public static void main(String[] args) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        
        try {
            int a = Integer.parseInt(reader.readLine());
            System.out.println((int) (a + Math.pow(a, 2) + Math.pow(a, 3)));
        } catch (NumberFormatException | IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
}
/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