import java.util.*;
class Polynom{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int x = sc.nextInt();
		int mon1 = 5 * x;
		int mon2 = mon1 + 3 * x * x;
		mon1 = mon2 + x * x * x;
	       	System.out.println(mon1);
		sc.close();
	}
}