import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.StringTokenizer;

public class Main{

    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int a = fs.nextInt();
        System.out.println(a + a*a + a*a*a);
    }

    static void sort(int[] a){
        ArrayList<Integer>l = new ArrayList<>();
        for(int i: a)
            l.add(i);
        Collections.sort(l);
        for(int i = 0; i < a.length; i++)
            a[i] = l.get(i);
    }

    static class FastScanner{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer("");
        String next(){
            while(!st.hasMoreTokens())
                try{
                    st = new StringTokenizer(br.readLine());
                } catch(IOException e){
                    e.printStackTrace();
                }
            return st.nextToken();
        }

        int nextInt(){
            return Integer.parseInt(next());
        }
        int[] readArray(int n){
            int[] a = new int[n];
            for(int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        }
        long nextLong(){
            return Long.parseLong(next());
        }
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.util.ArrayList; ArrayList java.util import java.util.Collections; Collections java.util import java.util.StringTokenizer; StringTokenizer java.util public class Main{

    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int a = fs.nextInt();
        System.out.println(a + a*a + a*a*a);
    }

    static void sort(int[] a){
        ArrayList<Integer>l = new ArrayList<>();
        for(int i: a)
            l.add(i);
        Collections.sort(l);
        for(int i = 0; i < a.length; i++)
            a[i] = l.get(i);
    }

    static class FastScanner{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer("");
        String next(){
            while(!st.hasMoreTokens())
                try{
                    st = new StringTokenizer(br.readLine());
                } catch(IOException e){
                    e.printStackTrace();
                }
            return st.nextToken();
        }

        int nextInt(){
            return Integer.parseInt(next());
        }
        int[] readArray(int n){
            int[] a = new int[n];
            for(int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        }
        long nextLong(){
            return Long.parseLong(next());
        }
    }
} Main public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int a = fs.nextInt();
        System.out.println(a + a*a + a*a*a);
    } main {
        FastScanner fs = new FastScanner();
        int a = fs.nextInt();
        System.out.println(a + a*a + a*a*a);
    } FastScanner fs = new FastScanner(); fs new FastScanner() int a = fs.nextInt(); a fs.nextInt() fs.nextInt fs System.out.println(a + a*a + a*a*a) System.out.println System.out System System.out a + a*a + a*a*a a + a*a + a*a*a a a*a a a a*a*a a*a*a a a a String[] args args static void sort(int[] a){
        ArrayList<Integer>l = new ArrayList<>();
        for(int i: a)
            l.add(i);
        Collections.sort(l);
        for(int i = 0; i < a.length; i++)
            a[i] = l.get(i);
    } sort {
        ArrayList<Integer>l = new ArrayList<>();
        for(int i: a)
            l.add(i);
        Collections.sort(l);
        for(int i = 0; i < a.length; i++)
            a[i] = l.get(i);
    } ArrayList<Integer>l = new ArrayList<>(); l new ArrayList<>() for(int i: a)
            l.add(i); int i a l.add(i); l.add(i) l.add l i Collections.sort(l) Collections.sort Collections l for(int i = 0; i < a.length; i++)
            a[i] = l.get(i); int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i a[i] = l.get(i); a[i] = l.get(i) a[i] a i l.get(i) l.get l i int[] a a static class FastScanner{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer("");
        String next(){
            while(!st.hasMoreTokens())
                try{
                    st = new StringTokenizer(br.readLine());
                } catch(IOException e){
                    e.printStackTrace();
                }
            return st.nextToken();
        }

        int nextInt(){
            return Integer.parseInt(next());
        }
        int[] readArray(int n){
            int[] a = new int[n];
            for(int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        }
        long nextLong(){
            return Long.parseLong(next());
        }
    } FastScanner BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) StringTokenizer st = new StringTokenizer(""); st new StringTokenizer("") String next(){
            while(!st.hasMoreTokens())
                try{
                    st = new StringTokenizer(br.readLine());
                } catch(IOException e){
                    e.printStackTrace();
                }
            return st.nextToken();
        } next {
            while(!st.hasMoreTokens())
                try{
                    st = new StringTokenizer(br.readLine());
                } catch(IOException e){
                    e.printStackTrace();
                }
            return st.nextToken();
        } while(!st.hasMoreTokens())
                try{
                    st = new StringTokenizer(br.readLine());
                } catch(IOException e){
                    e.printStackTrace();
                } !st.hasMoreTokens() st.hasMoreTokens() st.hasMoreTokens st try{
                    st = new StringTokenizer(br.readLine());
                } catch(IOException e){
                    e.printStackTrace();
                } catch(IOException e){
                    e.printStackTrace();
                } IOException e {
                    e.printStackTrace();
                } e.printStackTrace() e.printStackTrace e {
                    st = new StringTokenizer(br.readLine());
                } st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) return st.nextToken(); st.nextToken() st.nextToken st int nextInt(){
            return Integer.parseInt(next());
        } nextInt {
            return Integer.parseInt(next());
        } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next int[] readArray(int n){
            int[] a = new int[n];
            for(int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        } readArray {
            int[] a = new int[n];
            for(int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        } int[] a = new int[n]; a new int[n] n for(int i = 0; i < n; i++)
                a[i] = nextInt(); int i = 0; int i = 0; i 0 i < n i n i++ i++ i a[i] = nextInt(); a[i] = nextInt() a[i] a i nextInt() nextInt return a; a int n n long nextLong(){
            return Long.parseLong(next());
        } nextLong {
            return Long.parseLong(next());
        } return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next public class Main{

    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int a = fs.nextInt();
        System.out.println(a + a*a + a*a*a);
    }

    static void sort(int[] a){
        ArrayList<Integer>l = new ArrayList<>();
        for(int i: a)
            l.add(i);
        Collections.sort(l);
        for(int i = 0; i < a.length; i++)
            a[i] = l.get(i);
    }

    static class FastScanner{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer("");
        String next(){
            while(!st.hasMoreTokens())
                try{
                    st = new StringTokenizer(br.readLine());
                } catch(IOException e){
                    e.printStackTrace();
                }
            return st.nextToken();
        }

        int nextInt(){
            return Integer.parseInt(next());
        }
        int[] readArray(int n){
            int[] a = new int[n];
            for(int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        }
        long nextLong(){
            return Long.parseLong(next());
        }
    }
} public class Main{

    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int a = fs.nextInt();
        System.out.println(a + a*a + a*a*a);
    }

    static void sort(int[] a){
        ArrayList<Integer>l = new ArrayList<>();
        for(int i: a)
            l.add(i);
        Collections.sort(l);
        for(int i = 0; i < a.length; i++)
            a[i] = l.get(i);
    }

    static class FastScanner{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer("");
        String next(){
            while(!st.hasMoreTokens())
                try{
                    st = new StringTokenizer(br.readLine());
                } catch(IOException e){
                    e.printStackTrace();
                }
            return st.nextToken();
        }

        int nextInt(){
            return Integer.parseInt(next());
        }
        int[] readArray(int n){
            int[] a = new int[n];
            for(int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        }
        long nextLong(){
            return Long.parseLong(next());
        }
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.StringTokenizer;

public class Main{

    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int a = fs.nextInt();
        System.out.println(a + a*a + a*a*a);
    }

    static void sort(int[] a){
        ArrayList<Integer>l = new ArrayList<>();
        for(int i: a)
            l.add(i);
        Collections.sort(l);
        for(int i = 0; i < a.length; i++)
            a[i] = l.get(i);
    }

    static class FastScanner{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer("");
        String next(){
            while(!st.hasMoreTokens())
                try{
                    st = new StringTokenizer(br.readLine());
                } catch(IOException e){
                    e.printStackTrace();
                }
            return st.nextToken();
        }

        int nextInt(){
            return Integer.parseInt(next());
        }
        int[] readArray(int n){
            int[] a = new int[n];
            for(int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        }
        long nextLong(){
            return Long.parseLong(next());
        }
    }
}