import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int a = sc.nextInt();
		
        int A = 1;
		int sum = 0;
		
       for(int i=0;i<3;i++){
         A=A*a;
         sum+=A;
        }
      
		System.out.println(sum);
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int a = sc.nextInt();
		
        int A = 1;
		int sum = 0;
		
       for(int i=0;i<3;i++){
         A=A*a;
         sum+=A;
        }
      
		System.out.println(sum);
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int a = sc.nextInt();
		
        int A = 1;
		int sum = 0;
		
       for(int i=0;i<3;i++){
         A=A*a;
         sum+=A;
        }
      
		System.out.println(sum);
	} main {
		Scanner sc = new Scanner(System.in);
		
		int a = sc.nextInt();
		
        int A = 1;
		int sum = 0;
		
       for(int i=0;i<3;i++){
         A=A*a;
         sum+=A;
        }
      
		System.out.println(sum);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int A = 1; A 1 int sum = 0; sum 0 for(int i=0;i<3;i++){
         A=A*a;
         sum+=A;
        } int i=0; int i=0; i 0 i<3 i 3 i++ i++ i {
         A=A*a;
         sum+=A;
        } {
         A=A*a;
         sum+=A;
        } A=A*a A A*a A a sum+=A sum A System.out.println(sum) System.out.println System.out System System.out sum String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int a = sc.nextInt();
		
        int A = 1;
		int sum = 0;
		
       for(int i=0;i<3;i++){
         A=A*a;
         sum+=A;
        }
      
		System.out.println(sum);
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int a = sc.nextInt();
		
        int A = 1;
		int sum = 0;
		
       for(int i=0;i<3;i++){
         A=A*a;
         sum+=A;
        }
      
		System.out.println(sum);
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int a = sc.nextInt();
		
        int A = 1;
		int sum = 0;
		
       for(int i=0;i<3;i++){
         A=A*a;
         sum+=A;
        }
      
		System.out.println(sum);
	}
}