#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
FILE*f=fopen("evaluare.in","r");
FILE*g=fopen("evaluare.out","w");
char s[100000][11];
char st[100000];
char rez[100000][11];
int n; //numarul de linii ale lui s[][]
void read()
 {
  char x,y;
  int p;
  y='!';
  p=0;
  while(!feof(f))
   {
   fscanf(f,"%c",&x);
   if(x!='\n') {++n;
   if(isdigit(y) && isdigit(x)) { n--;++p;}
   else p=0;
   s[n][p]=x;
   y=x;         }
   }

 }
void poloneza()
 {
 int i,k,vf=0;
 st[0]='!';
 k=0;
 for(i=1;i<=n;++i)
  {
   if(s[i][0]=='+' || s[i][0]=='-')
      {
      while(st[vf]=='*' || st[vf]=='/' || st[vf]=='-' || st[vf]=='+')
       {
       rez[k++][0]=st[vf];
       --vf;
       }
      st[++vf]=s[i][0];
      }
   else if(s[i][0]=='(') st[++vf]='(';
   else if (s[i][0]==')')
     {
       //copiez in rez toti operanzii pana la ).
       while(st[vf]!='(')
	 {
	  rez[k++][0]=st[vf];
	  --vf;
	 }
       --vf; //sterg '(';
     }
   else
    if (s[i][0]=='*' || s[i][0]=='/')
      {
      while(st[vf]=='*' || st[vf]=='/')
       {
       rez[k++][0]=st[vf];
       --vf;
       }
      st[++vf]=s[i][0];
      }
   else
     {
     strcpy(rez[k++],s[i]);
     }
  }
 while(st[vf]!='!')
  {
  rez[k++][0]=st[vf];
  vf--;
  }
 n=k;
 }
void eval()
 {
 int x,y,i,vf=-1;
 char st[100000][11];
 for(i=0;i<n;++i)
  {
  if(rez[i][0]=='+' || rez[i][0]=='-' || rez[i][0]=='*' || rez[i][0]=='/')
    {
     x=atoi(st[vf]);
     --vf;
     y=atoi(st[vf]);
     switch(rez[i][0])
      {
      case '+': itoa(x+y,st[vf],10); break;
      case '-': itoa(y-x,st[vf],10); break;
      case '*': itoa(x*y,st[vf],10); break;
      case '/': itoa(y/x,st[vf],10); break;
      }
    }
  else
   strcpy(st[++vf],rez[i]);
  }
 fprintf(g,"%s\n",st[0]);
 }
int main()
 {
 read();
 poloneza();
 eval();
 return 0;
 }