#include <bits/stdc++.h>
#define paranteza 1000000001
#define scadere 1000000002
#define inmultire 1000000003
#define impartire 1000000004

using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char s[100005];
int st[100005],top;
void Rez()
{
    int nr;
    for(int i=0;s[i];)
    {

        if(s[i]=='(')
            st[++top]=paranteza,
            i++;

        if(s[i]=='+')
            i++;

        if(s[i]=='*')
            st[++top]=inmultire,
            i++;

        if(s[i]=='/')
            st[++top]=impartire,
            i++;

        if(s[i]=='-')
            st[++top]=impartire,
            i++;

        if(s[i]>='0' && s[i]<='9')
        {
            nr=0;

            while(s[i]>='0' && s[i]<='9')
                nr=nr*10+(s[i]-'0'),
                i++;

            if(st[top]==scadere)
                nr*=-1,
                top--;

            while(st[top]==inmultire && top)
                top--,
                nr*=st[top--];

            while(st[top]==impartire && top)
                top--,
                nr=st[top]/nr,
                top--;

            st[++top]=nr;

        }

        if(s[i]==')')
        {
            nr=0;
            while(st[top]!=paranteza && top)
                nr+=st[top--];

            top--;

            if(st[top]==scadere)
                nr*=-1,
                top--;

            while(st[top]==inmultire && top)
                top--,
                nr*=st[top--];

            while(st[top]==impartire && top)
                top--,
                nr=st[top]/nr,
                top--;

            st[++top]=nr;
            i++;
        }
    }
    nr=0;
    for (int i=1; i<=top; i++)
        nr+=st[i];
    fout<<nr<<"\n";
}
int main()
{
    fin>>s;
    Rez();
    return 0;
}