#include<fstream>
#include<ctype.h>
#include<string.h>
using namespace std;
char expr[100005];
long lg,i;

ifstream f("evaluare.in");
ofstream g("evaluare.out");

long evaluare_expresie();
long evaluare_factor()
{
 long f=0;
 if (expr[i] == '(')
 {
  i++;
  f = evaluare_expresie();
  i++;
 }
 else
  while (i < lg && !strchr("+-*/()", expr[i]))
  {
   f = f * 10 + (expr[i] - '0');
   i++;
  }
 return f;
}

long evaluare_termen()
{
 long T = evaluare_factor();
 while (i < lg && strchr("*/", expr[i]))
 {
  char semn = expr[i];
  i++;
  if (semn == '*')
   T *= evaluare_factor();
  else
   T /= evaluare_factor();
 }
 return T;

}

long evaluare_expresie()
{
 long E = evaluare_termen();
 while (i < lg && strchr("+-", expr[i]))
 {
  char semn = expr[i];
  i++;
  if (semn == '+')
   E += evaluare_termen();
  else
   E -= evaluare_termen();


 }
 return E;
}

int main()
{
 f.getline(expr, 100005);
 lg = strlen(expr);
 g << evaluare_expresie();
 return 0;
}