#include <cstdio>   
#include <cstring>   
  
char s[100010];   
char *p=s;   
char operand[4][4] = {"+-", "*/", "^", ""};   
const long hmax = 2;   
  
long operatie(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(operand[h], *p) )    
        r = operatie(r, eval(h+1), *(++p-1));   
    return r;   
}   
  
  
int main() {   
    fgets(s, 100010, fopen("evaluare.in", "r"));   
    fprintf(fopen("evaluare.out", "w"), "%ld\n", eval(0));   
    return 0;   
}