#include <bits/stdc++.h>
#define ll long long
#define NM 100005
using namespace std;
ifstream fin ("evaluare.in");
ofstream fout ("evaluare.out");
char s[NM], *p;
ll termen();
ll factor();
ll eval()
{
    ll r = termen();
    while(*p == '+' || *p == '-')
    {
        if(*p == '+')
        {
            ++p;
            r+=termen();
        }
        else
        {
            ++p;
            r-=termen();
        }
    }
    return r;
}
ll termen()
{
    ll r = factor();
    while(*p == '*' || *p == '/')
    {
        if(*p == '*')
        {
            ++p;
            r*=factor();
        }
        else
        {
            ++p;
            r/=factor();
        }
    }
    return r;
}
ll factor()
{
    ll r = 0;
    if(*p == '(')
    {
        ++p;
        r = eval();
        ++p;
    }
    else while(isdigit(*p))
    {
        r = r*10 + *p - '0';
        ++p;
    }
    return r;
}
int main()
{
    fin.getline(s, NM);
    p = s;
    fout << eval();
    return 0;
}