#include <fstream>
using namespace std;

char S[100001], *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);
    fgets(S, 100001, stdin);
    printf("%ld\n", eval());
    return 0;
}