# include <cstdio>
# include <cstring>
using namespace std;
const long MAX=100010;
char S[MAX], *p=S;
long termen();
long factor();
long eval()
{
    long r=termen();
    while( *p=='+' || *p=='-' )
    {
        switch(*p)
        {
            case '+':
                ++p;
                r+=termen();
                break;
            case '-':
                ++p;
                r-=termen();
                break;
        }
    }
    return r;
}
long termen()
{
    long r=factor();
    while(*p=='*' || *p=='/')
    {
        switch(*p)
        {
            case '*':
                ++p;
                r*=factor();
                break;
            case '/':
                ++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);
    gets(S);
    printf("%ld\n",eval());
    return 0;
}