#include <fstream>
#include <iostream>
#include <stack>
#include <vector>
#include <cstring>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
int NMAX = 100005,n,NEXT[100005];
char s[100005];
stack <int> St;
inline int Eval(const int st,const int dr)
{
    vector <int> v;
    int i,nr,x,semn,sol;
    x = sol = 0;
    semn = 1;
    for(i = st; i <= dr; i++)
    {
        if(s[i]=='(')
        {
            x = Eval(i+1,NEXT[i]-1);
            i = NEXT[i];
            continue;
        }
        if('0'<= s[i] && s[i]<='9')
        {
            x=x*10+(s[i]-'0');
            continue;
        }
        if(semn==0) v.back()*=x;
        else if(semn==-2) v.back()/=x;
        else v.push_back(semn*x);
        if(s[i]=='*')   semn = 0;
        else if(s[i]=='/')  semn = -2;
        else
        {
            semn = 1;
            if(s[i]=='-') semn = -1;
        }
        x = 0;
    }
    if(semn == 0) v.back()*=x;
    else if(semn == -2) v.back()/=x;
    else v.push_back(x*semn);
    for(i = 0; i < v.size(); i++)
        sol+=v[i];
    return sol;
}

void Check()
{
    int i;
    for(i = 1; i <= n; i++)
    {
        if(s[i]=='(') St.push(i);
        else if(s[i]==')')
        {
            NEXT[St.top()] = i;
            St.pop();
        }
    }
}
int main()
{
    fin>>(s+1);
    n = strlen(s+1);
    Check();
    fout<<Eval(1,n)<<"\n";
    fout.close();
    return 0;
}