#include <fstream>
#include <algorithm>
#include <math.h>
using namespace std;

ifstream fin("ecuatie.in");
ofstream fout("ecuatie.out");

int fac1[10010], fac2[10010];
int main()
{
    int a, b, c, k, cur = 0, idx1 = 0, idx2 = 0, absA, absC;
    fin >> a >> b >> c >> k;
    absA = abs(a); absC = abs(c);
    for(int i = 1; i*i <= absA; i ++)
        if(a % i == 0)
        {
            fac1[idx1++] = i; if(absA/i != i) fac1[idx1++] = a/i;
            fac1[idx1++] = -i; if(absA/i != i) fac1[idx1++] = -a/i;
        }
    for(int i = 1; i*i <= absC; i ++)
        if(c % i == 0)
        {
            fac2[idx2++] = i; if(absC/i != i) fac2[idx2++] = c/i;
            fac2[idx2++] = -i; if(absC/i != i) fac2[idx2++] = -c/i;
        }
    sort(fac1, fac1+idx1); sort(fac2, fac2+idx2);
    if(k > idx1*idx2)
    {
        fout << "-1\n";
        return 0;
    }
    for(int i = 0; i < idx1; i ++)
        for(int j = 0; j < idx2; j ++)
        {
            if(fac1[i] * (c/fac2[j]) + (a/fac1[i]) * fac2[j] == b)
                cur ++;
            if(cur == k)
            {
                string s1 = ((fac1[i]==1)?"":"-");
                fout << "(" << ((abs(fac1[i])==1)?s1:to_string(fac1[i])) << "x" << ((abs(fac2[j])==fac2[j])?"+":"-") << abs(fac2[j]) << ")";
                s1 = (((a/fac1[i])==1)?"":"-");
                fout << "(" << ((abs(a/fac1[i])==1)?s1:to_string(a/fac1[i])) << "x" << ((abs(c/fac2[j])==c/fac2[j])?"+":"-") << abs(c/fac2[j]) << ")\n";
                return 0;
            }
        }
    fout << "-1\n";
}