#include <fstream>
#include <cstring>

using namespace std;

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

const int DIM = 1e5;

int l;
char s[DIM + 5];

long long SumaDif(int &p);
long long ProdCat(int &p);
long long ParantezeVal(int &p);

long long SumaDif(int &p)
{
    long long res = ProdCat(p);

    while(p <= l && (s[p] == '+' || s[p] == '-')) {

        if(s[p] == '+')
            p++, res += ProdCat(p);
        else
            p++, res -= ProdCat(p);

    }

    return res;
}

long long ProdCat(int &p)
{
    long long res = ParantezeVal(p);

    while(p <= l && (s[p] == '*' || s[p] == '/')) {

        if(s[p] == '*')
            p++, res *= ParantezeVal(p);
        else
            p++, res /= ParantezeVal(p);

    }

    return res;
}

long long ParantezeVal(int &p)
{
    if(s[p] == '(')
        {
            p++;
            long long res = SumaDif(p);
            p++;

            return res;
        }

    long long nr = 0;

    while(isdigit(s[p])) {

        nr = nr * 10LL + (s[p] - '0');
        p++;

    }

    return nr;
}

int main()
{
    fin >> s; l = strlen(s) - 1;

    int p = 0;
    fout << SumaDif(p) << '\n';

    return 0;
}