#include <fstream>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");

const int N = 1e5 + 1;
char s[N];
int p;
int expresie();
int termen();
int factor();

int expresie()
{
    int sum = termen();
    while(s[p] == '+' || s[p] == '-')
    {
        if(s[p] == '+')
        {
            p++;
            sum+= termen();
        }
        else
        {
            p++;
            sum-= termen();
        }
    }
    return sum;
}
int termen()
{
    int prod = factor();
    while(s[p] == '*' || s[p] == '/')
    {
        if(s[p] == '*')
        {
            p++;
            prod = prod * factor();
        }
        else
        {
            p++;
            prod = prod / factor();
        }
    }
    return prod;
}
int factor()
{
    int val = 0, semn = 1;
    while(s[p] == '-')
    {
        p++;
        semn = -semn;
    }
    if(s[p] == '(')
    {
        p++;
        val = expresie();
        p++;
        return semn * val;
    }
    while(isdigit(s[p]))
    {
        val = val * 10 + (s[p] - '0');
        p++;
    }
    return semn * val;
}

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