#include <iostream>

using namespace std;

int F(int N, int M){
        while(N != 0 && M != 0)
            if (N > M) N %= M;
            else M %= N;
    return N + M;
}

int main()
{
    int a, b;
    cin >> a >> b;
    int D = F(a, b);
    cout << "F1 = " << a / D << '/' << b / D << endl;
    cout << "F2 = " << a * b / D << endl;
    int d, c;
    cin >> d >> c;
    int n = a * c + b * d;
    int m = b * c;
    int D3 = F(n, m);
    cout << "F3 = " << n / D3 << '/' << m / D3 << endl;
    cin >> n;
    int *A = new int[n];
    for (int i = 0; i < n; i++)
        cin >> A[i];
    int D4 = F(A[0], A[1]);
    for (int i = 2; i < n; i++)
        D4 = F(D4, A[i]);
    cout << "F4 = " << D4;
    return 0;
}