#include <cstdio>
#include <cstring>
char s[100010];
char *p=s;
char ope[4][4]={"+-","*/","^",""};
const long hmax=2;
long op(long x,long y,char c) {
 switch(c){
  case '+':return x+y;
  case '-':return x-y;
  case '*':return x*y;
  case '/':return x/y;
 }
 return 0;
}
long eval(long);
long element(){
 long r=0;
 if(*p=='('){++p;r=eval(0);++p;}
 else{while(strchr("0123456789",*p)){r=r*10+*(++p-1)-'0';}}
 return r;
}
long eval(long h){
 long r=(h==hmax)?element():eval(h+1);
 while(strchr(ope[h],*p)){r=op(r,eval(h+1),*(++p-1));}
 return r;
}
main(){
 fgets(s,100010,fopen("evaluare.in","r"));
 fprintf(fopen("evaluare.out","w"),"%ld\n",eval(0));
}