#include <iostream>
#include <fstream>

#define MAX 100010
using namespace std;

char S[MAX],*p=S;

long termen();
long factor();

long eval()
{
    long r=factor();
    while(*p=='+' || *p=='-')
        {
            switch(*p)
            {
            case '+':
                p++;
                r+=factor();
                break;
            case '-':
                ++p;
                r-=factor();
                break;
            }
        }
    return r;
}
long factor()
{
    long r=termen();
    while(*p=='*' || *p=='/')
    {
        switch(*p)
        {
        case '*':
             p++;
             r*=termen();
             break;
        case '/':
            p++;
            r/=termen();
        }
    }
    return r;
}

long termen()
{
    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.out","w",stdout)
fgets(S,MAX,fopen("evaluare.in","r"));
printf("%ld\n",eval());

return 0;
}