#include<fstream>
#include<ctype.h>
#include<string.h>
using namespace std;
char expr[100005];
long lg, i;

ifstream f("evaluare.in");
ofstream g("evaluare.out");

long evaluare_expresie();
long evaluare_factor()
{
	long f = 0;
	if (expr[i] == '(')
	{
		i++;
		f = evaluare_expresie();
		i++;
	}
	else
		while (i < lg && !strchr("+-*/()", expr[i]))
		{
			f = f * 10 + (expr[i] - '0');
			i++;
		}
	return f;
}

long evaluare_termen()
{
	long T = evaluare_factor();
	while (i < lg && strchr("*/", expr[i]))
	{
		char semn = expr[i];
		i++;
		if (semn == '*')
			T *= evaluare_factor();
		else
			T /= evaluare_factor();
	}
	return T;

}

long evaluare_expresie()
{
	long E = evaluare_termen();
	while (i < lg && strchr("+-", expr[i]))
	{
		char semn = expr[i];
		i++;
		if (semn == '+')
			E += evaluare_termen();
		else
			E -= evaluare_termen();


	}
	return E;
}

int main()
{
	f.getline(expr, 100005);
	lg = strlen(expr);
	g << evaluare_expresie();
	return 0;