#include <fstream>

using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
const int N=100001;
char s[N];
int p;
int expresie();
int termen();
int factor();
int expresie()
{
    int sum=termen();
    while(s[p]=='+' || s[p]=='-')
    {
        if(s[p]=='+')
        {
            p++;
            sum+=termen();
        }
        else
        {
            p++;
            sum-=termen();
        }
    }
    return sum;
}
int termen()
{
    int prod=factor();
    while(s[p]=='*' || s[p]=='/')
    {
        if(s[p]=='*')
        {
            p++;
            prod*=factor();
        }
        else
        {
            p++;
            prod/=factor();
        }
    }
    return prod;
}
 int factor()
 {
     int val=0, semn=1;
     while(s[p]=='-')
     {
         p++;
         semn=-semn;
     }
     if(s[p]=='(')
     {
         p++;
         val=expresie();
         p++;
         return semn*val;
     }
     while(s[p]>='0' && s[p]<'9')
     {
         val=val*10+(s[p]-'0');
         p++;
     }
     return semn*val;
 }
int main()
{
    fin.getline(s,N+1);
    fout<<expresie();
    return 0;
}