import java.lang.System;

public class frac

{

int nu1,nu2,de1,de2;

public void inic(int n1,int d1,int n2,int d2)

{

nu1=n1;

nu2=n2;

de1=d1;

de2=d2;

}

public void oper()

{

int r1,r2,r3,r4;

r1=de1*de2;

r2=nu1*de2;

r3=de1*nu2;

r4=r2+r3;

System.out.print(+nu1);

System.out.print("/");

System.out.print(+de1);

System.out.print(" + ");

System.out.print(+nu2);

System.out.print("/");

System.out.print(+de2);

System.out.print(" = "+r4);

System.out.print("/");

System.out.print(+r1);

System.out.println("");

}

public static void main(String [] args)

{

frac d;

d=new frac();

d.inic(1,2,1,2);

d.oper();

}

}