#include <iostream>
#include <fstream>

using namespace std;

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

typedef long long int var;
const int NMax = 100005;
char s[NMax],*p = s;

var termen();
var factor();

var eval(){
    var r = termen();
    while(*p == '+' || *p == '-'){
        if(*p == '+'){
            p++;
            r += termen();
        }
        if(*p == '-'){
            p++;
            r -= termen();
        }
    }
    return r;
}

var termen(){
    var r = factor();
    while(*p == '*' || *p == '/'){
        if(*p == '*'){
            p++;
            r *= factor();
        }
        if(*p == '/'){
            p++;
            r /= factor();
        }
    }
    return r;
}

var factor(){
    var r = 0;
    if(*p == '('){
        p++;
        r = eval();
        p++;
    } else {
        while(*p >= '0' && *p <= '9'){
            r = r * 10 + (*p - '0');
            p++;
        }
    }
    return r;
}

int main()
{
    fin >> s;
    fout << eval();
    return 0;
}