#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
int i=0;
string s;
long long adun(long long val,char semn)
{
    long long x=0,x2;
    char semn2;
    while(i<s.size())
    {
        if(s[i]=='+' || s[i]=='-')
        {
            if(semn=='+')val+=x;
            else val-=x;
            semn=s[i];
        }
        else if(s[i]=='*' || s[i]=='/')
        {
            while(s[i]=='*' || s[i]=='/')
            {
                semn2=s[i];
                i++;
                if(s[i]=='(')
                   {
                       i++;
                       x2=adun(0,'+');
                       i++;
                   }
                else
                {
                    x2=0;
                    while(isdigit(s[i]))
                    {
                        x2=x2*10+(s[i]-'0');
                        i++;
                    }
                }
                if(semn2=='*')
                    x*=x2;
                else x/=x2;
            }
            i--;
        }
        else if(s[i]=='(')
        {
            i++;
            x=adun(0,'+');
        }
        else if(s[i]==')')
        {
            if(semn=='+')val+=x;
            else val-=x;
            return val;
        }
        else
        {
            x=0;
            while(isdigit(s[i]))
            {
                x=x*10+(s[i]-'0');
                i++;
            }
            i--;
        }
        i++;
    }
     if(semn=='+')val+=x;
        else if(semn=='-') val-=x;
    return val;
}
int main()
{
    fin>>s;
    fout<<adun(0,'+');
    return 0;
}