#include <fstream>
#include <cstring>
#define NMAX 100005
using namespace std;
ifstream in ("evaluare.in");
ofstream out ("evaluare.out");
char s[NMAX];
int i;

bool isdigit (char x)
{
    return x >= '0' && x <= '9';
}

int adunare();

int factor ()
{
    int nr;
    if(s[i] == '(')
    {
        ++i;
        nr = adunare();
        ++i;
    }
    else
    {
        nr = 0;
        while (isdigit(s[i]))
        {
            nr = nr * 10 + s[i] - '0';
            ++i;
        }
    }
    return nr;
}

int inmultire ()
{
    int rez = factor();
    while (s[i] == '*' || s[i] == '/')
    {
        if (s[i] == '*')
        {
            ++i;
            rez = rez * factor();
        }
        else if (s[i] == '/')
        {
            ++i;
            rez = rez / factor();
        }
    }
    return rez;
}

int adunare ()
{
    int suma;
    suma = inmultire();
    while (s[i] == '+' || s[i] == '-')
    {
        if (s[i] == '+')
        {
            ++i;
            suma = suma + inmultire();
        }
        else if (s[i] == '-')
        {
            ++i;
            suma = suma - inmultire();
        }
    }
    return suma;
}

int main()
{
    in.getline(s, NMAX);
    out << adunare();
    return 0;
}