#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;
}