import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone {
	public static void main (String[] args)	{
		Scanner in=new Scanner(System.in);
		double x=in.nextDouble();
		double p=in.nextDouble();
		p = (((2*x + 3)*x - 4)*x - 5)*x + 6;
		System.out.println(p);
	}
}