using System;

​

public class Rational

{

    public int num;

    public int denum;

    public double dec;

    public Rational(int n, int d)

    {

        this.num = n;

        this.denum = d;

    }

​

    public Rational(Rational r) //копиращ конструктор 

    {

        this.num = r.num;

        this.denum = r.denum;

    }

​

    public void Add(Rational r)

    {

        this.num = this.num * r.denum + r.num * this.denum;

        this.denum = r.denum * this.denum;

        int g = GCD(num, denum);

        this.num = this.num / g;

        this.denum = this.denum / g;

        Console.WriteLine(this.num + "/" + this.denum);

    }

​

    public void Sub(Rational r)

    {

        this.num = this.num * r.denum - r.num * this.denum;

        this.denum = r.denum * this.denum;

        int g = GCD(num, denum);

        this.num = this.num / g;

        this.denum = this.denum / g;

    }

​

    public void Mult(Rational r)

    {

        this.num = this.num * r.num;

        this.denum = this.denum * r.denum;

        int g = GCD(num, denum);

        this.num = this.num / g;

        this.denum = this.denum / g;

    }

​

    public void Div(Rational r)

    {

        this.num = this.num * r.denum;

        this.denum = this.denum * r.num;

        int g = GCD(num, denum);

        this.num = this.num / g;

        this.denum = this.denum / g;

    }

​

    public int Compare(Rational r)

    {

        if (this.num * r.denum > r.num * this.denum)

            return 1;

        if (this.num * r.denum < r.num * this.denum)

            return -1;

        return 0;

    }

​

    public void Dec()

    {

        this.dec = (double)this.num / this.denum;

    }

​

    public void Print(Rational r)

    {

        this.dec = (double)this.num / this.denum;

        Console.WriteLine(this.dec);

        normPrint();

    }

​

    public void normPrint()

    {

        if (this.denum == 1)

            Console.WriteLine(this.num);

        else if (this.num == 0)

            Console.WriteLine("0");

        else

            Console.WriteLine(this.num + " / " + this.denum);

    }

​

    private int GCD(int a, int b)

    {

        int tmp, r;

        if (a < b)

        {

            tmp = a;

            a = b;

            b = tmp;

        }

​

        while (b != 0)

        {

            r = a % b;

            a = b;

            b = r;

        }

​

        return a;

    }

}

​

public class Program

{

    public static void Main()

    { //Rational rc = new Rational(); 

        //rc.num = 1234;  

        //rc.denum = 2345;  

        //rc.Dec();     

        //rc.Print(rc);   

        int xnum, xdenum, ynum, ydenum;

        xnum = int.Parse(Console.ReadLine());

        xdenum = int.Parse(Console.ReadLine());

        ynum = int.Parse(Console.ReadLine());

        ydenum = int.Parse(Console.ReadLine());

        Rational x = new Rational(xnum, xdenum);

        Rational y = new Rational(ynum, ydenum);

        Rational a = new Rational(x);

        a.Add(y);

        a.Print(a);

        //Console.WriteLine(xnum+"/"+xdenum+" "+ynum+"/"+ydenum);  

        Rational s = new Rational(x);

        s.Sub(y);

        s.Print(s);

        Rational m = new Rational(x);

        m.Mult(y);

        m.Print(m);

        Rational d = new Rational(x);

        d.Div(y);

        d.Print(d);

        int c = x.Compare(y);

        if (c == 1)

            Console.WriteLine("x>y");

        else if (c == -1)

            Console.WriteLine("x<y");

        else

            Console.WriteLine("x=y");

    }

}