#include <bits/stdc++.h>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
string s;
int ind = 0;
int term(), fact();
int expresie()
{
    int sum = term();
    while(s[ind] == '+' || s[ind] == '-')
    {
        if(s[ind] == '+') ind++, sum += term();
        else ind++, sum -= term();
    }
    return sum;
}

int term()
{
    int prod = fact();
    while(s[ind] == '*' || s[ind] == '/')
    {
        if(s[ind] == '*') ind++, prod *= fact();
        else ind++, prod /= fact();
    }
    return prod;
}

int fact()
{
    int sign = 1, val = 0;
    while(s[ind] == '-') ind++, sign = -sign;
    if(s[ind] == '(')
    {
        ind++;
        val = expresie();
        ind++;
        return sign * val;
    }
    while(s[ind] >= '0' && s[ind] <= '9')
    {
        val = val * 10 + (s[ind] - '0');
        ind++;
    }
    return sign * val;
}

signed main()
{
    fin >> s;
    fout << expresie();
    return 0;
}