import java.util.Scanner;

public class Main {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

Fraction a = new Fraction(in.nextInt(), in.nextInt());

Fraction b = new Fraction(in.nextInt(), in.nextInt());

a.print();

b.print();

a.plus(b).print();

a.multiply(b).plus(new Fraction(5, 6)).print();

a.print();

b.print();

in.close();

}

}

class Fraction {

int fenzi;

int fenmu;

Fraction() { // 无参构造

fenzi = 1;

fenmu = 1;

}

Fraction(int a, int b) {

fenzi = a;

fenmu = b;

}

double toDouble() {

return fenzi * 1.0 / fenmu;

}

Fraction plus(Fraction r) {

return new Fraction(this.fenmu * r.fenmu,this.fenzi * r.fenmu +

r.fenzi * this.fenmu);

}

Fraction multiply(Fraction r) {

return new Fraction(this.fenzi * r.fenzi,this.fenmu * r.fenmu);

}

/* 化简输出 */

void print() {

int temp;

int x = fenzi;

int y = fenmu;

// 求出最大公约数

while (x != 0) {

temp = y % x;

y = x;

x = temp;

}

fenzi /= y;

fenmu /= y;

if (fenzi == 0) {

System.out.println("0");

} else if (fenzi == fenmu) {

System.out.println("1");

} else {

System.out.println(fenzi + "/" + fenmu);

}

}

}