#include <iostream>
#include <string>
#include <sstream>
#include <algorithm>
#include <cmath>
#include <stdlib.h>
 
using namespace std;

struct function {
    char const * name ;
    double (* call)(double) ;
} ;

function table [] = {
    "cos",&cos,
    "sin",&sin,
    "abs",&fabs,
    "tan",&tan, 
    "arccos",&acos,
    "arcsin",&asin,
    "arctan",&atan,
    "exp",&exp,
    "ln",&log,
    "log",&log10,
    "sqrt",&sqrt  
} ;

template <typename Iterator> void F2(string & str, Iterator begin, Iterator end)
{
         Iterator i, temp, i1, beg;
         double x, d;
         string s, ss;
         for ( ;; ) { 
             int count = 0;
             for (i = str.begin ();i != str.end ();++i) { 
                 if( isalpha(*i) ) {
                        ++count;
                        beg = i;
                        while (isalpha(*i)) ++i;
                        s(beg,i+1);
                 }else if (*i == '(') {
                      temp = i;
                      while (*i != ')') ++i; 
                      ss(temp+1,i);
                      x = atof(ss.c_str ());
                 }
                 ostringstream sss;
                 sss << d ;
                 string s1 = sss.str();
                 str.replace (beg,i,s1) ;
                 break;
             }
             for (int a = 0;a < sizeof(table)/sizeof (table [0]);++a)
                     {
                         if (!strcmp (table [a].name,s.c_str()))
                         d = table [a].call(x) ;
                     }
             if (count == 0) return ;
         }
    
}
 
template <typename Iterator> void F1(string & str, Iterator begin, Iterator end)
{
         Iterator i, temp, i1;
         float f;
         for ( ;; ) { 
             int count = 0;
             for (i = str.begin ();i != str.end ();++i) { 
                 if (*i == '(') {
                        ++count;
                        temp = i;
                 }
                 else if (*i == ')') {
                      ++count;
                      f=F(temp+1,i);
                      ostringstream ss;
                      ss << f ;
                      string s = ss.str();
                      str.replace (temp,i+1,s) ;
                      break;
                 }
             }
             if (count == 0) return ;
         }
}
 
template <typename Iterator> float F(Iterator begin, Iterator end)
{     
 Iterator i;
 if ((i = find(begin,end,'+')) != end) {
 return F(begin,i) + F(i+1,end) ;
 }else if ((i = find(begin,end,'-')) != end) {
 return F(begin,i) - F(i+1,end) ;
 }else if ((i = find(begin,end,'*')) != end) {
 return F(begin,i) * F(i+1,end) ;
 }else if ((i = find(begin,end,'/')) != end) {
 return F(begin,i) / F(i+1,end) ;
 }else if ((i = find(begin,end,'^')) != end) {
 return pow(F(begin,i),F(i+1,end)) ;    
 }else { string str1(begin,end) ;
               istringstream stream(str1);
               float i;
               stream >> i;
               return  i ;              
      }
}
 
int main() 
{
    string str,str1;
    float a;
    getline(cin,str);
    F1(str,str.begin(),str.end());
    a=F(str.begin(),str.end());
    cout << "Ats: " << a << endl;
    cin.get();
}