#include <stdio.h>
#include <string.h>
#define MAX 100001

char a[MAX];
int n;

void citire()
{
   freopen ("evaluare.in","r",stdin);
   fgets(a,MAX,stdin);
   fclose (stdin);
}

long calcul(long a,long b,char c)
{
   switch (c)
   {
   case '+': return a+b;
   case '-':  return a-b;
   case '*': return a*b;
   default:  return a/b;
   }
}

long da(int st,int dr,char s1,char s2)
{
   int num=0;
   for (int i=dr;i>=st;i--)
   {
       if (a[i]==')')
	  num++;
       else
	 if (a[i]=='(')
	      num--;
	 else
	   if ((a[i]==s1 || a[i]==s2) && num==0)
	       return i;
   }

  return -1;
}

void paranteza(int &st,int &dr)
{
   int num=0;
   for (int i=dr-1;i>st;i--)
      if (a[i]==')')
	 num++;
      else
	if (a[i]=='(')
	   num--;
   if (num==0 && a[st]=='(' && a[dr]==')')
   {
       st++;
       dr--;
   }
}

long lal (int st,int dr)
{
   long nr=0;
  for (int i=st;i<=dr;i++)
       nr=nr*10+(a[i]-'0');
    return nr;
}

long lol(int st,int dr)
{
  paranteza(st,dr);
  long aux=da(st,dr,'+','-');
  if (aux<1)
     aux=da(st,dr,'*','/');
   if (aux<1)
       return lal(st,dr);
   return calcul(lol(st,aux-1),lol(aux+1,dr),a[aux]);
}

int main ()
{
   citire();
   n=strlen (a);
   freopen ("evaluare.out","w",stdout);
   printf ("%ld\n",lol(0,n-1));
   fclose(stdout);
   return 0;
}