#include<stdio.h>
#include<math.h>

long i, j, a, b, c, k, nr, nra, nrc, da[10/*0001*/], nda[10/*0001*/], dc[10/*0001*/], ndc[10/*0001*/];
FILE *fin, *fout;

int main()
{
	fin = fopen("ecuatie.in", "rt");
	fout = fopen("ecuatie.out", "wt");

	fscanf(fin, "%ld%ld%ld%ld", &a, &b, &c, &k);

	if(a < 0)
	{
		da[1] = -a;
		nda[1] = a;
	}
	else
	{
		da[1] = a;
		nda[1] = -a;
	}

	nra = 1;

	if(c < 0)
	{
		dc[1] = -c;
		ndc[1] = c;
	}
	else
	{
		dc[1] = c;
		ndc[1] = -c;
	}

	nrc = 1;

	for(long x = abs(a / 2); x >= 1; x--)
		if(a % x == 0)
		{
			nra++;
			da[nra] = x;
			nda[nra] = -x;
		}

	for(x = abs(c / 2); x >= 1; x--)
		if(c % x == 0)
		{
			nrc++;
			dc[nrc] = x;
			ndc[nrc] = -x;
		}

	long nr = 0;

	for(i = 1; i <= nra; i++)
	{
		long cta = a / nda[i];

		for(j = 1; j <= nrc; j++)
		{
			long ctc = c / ndc[j];

			if(a + c == -b)
			{
				nr++;

				if(nr == k)
				{
					fprintf(fout, "(");

					if(nda[i] == 1)
						fprintf(fout, "x");
					else
					{
						if(nda[i] == -1)
							fprintf(fout, "-x");
						else
							fprintf(fout, "%ldx", nda[i]);
					}

					if(ndc[j] < 0)
						fprintf(fout, "-%ld", ndc[j] * (-1));
					else
						fprintf(fout, "+%ld", ndc[j]);

					fprintf(fout, ")(");

					if(cta == 1)
						fprintf(fout, "x");
					else
					{
						if(cta == -1)
							fprintf(fout, "-x");
						else
							fprintf(fout, "%ldx", cta);
					}

					if(ctc < 0)
						fprintf(fout, "-%ld", ctc * (-1));
					else
						fprintf(fout, "+%ld", ctc);

					fprintf(fout, ")\n");

					break;
				}
			}
		}
	}

	return 0;
}