#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
char S[100010],*p=S;
long termen();
long factor();
long eval()
{
    long r =termen();
    while (*p=='+'||*p=='-')
    {
        if (*p=='+')
        {
            ++p;
            r+=termen();
            break;
        }
        else
        {
            ++p;
            r-=termen();
            break;
        }
    }
    return r;
}
long termen()
{
    long r = factor();
    while (*p=='*'||*p=='/')
    {
        if (*p=='*')
        {
            ++p;
            r*=factor();
            break;
        }
        else
        {
            ++p;
            r/=factor();
            break;
        }
    }
    return r;
}
long factor()
{
    long r= 0;
    if (*p=='(')
        {
            ++p;
            r = eval();
            ++p;
        }
    else
    {
        while (*p>='0'&&*p<='9')
          {
               r= r*10 + *p - '0';
                ++p;
          }
    }
    return r;
}
int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    scanf("%100000s",S);
    cout<<eval();
}