#include <cstdio>
#include <cstring>
#include <cmath>

char expr[100010];
char *p = expr;
int lmax = 3;
char op[4][4] = {"+-",
                 "*/",
                 "^",
                 ""};

long operatie(long x, long y, char o) {
    switch (o) {
        case '+': return x+y;
        case '-': return x-y;
        case '*': return x*y;
        case '/': return x/y;
        case '^': return pow(x,y);
    }
    return 0;
}

long eval(int l) {
    int r = 0;
    if (l == lmax) {
        if (*p == '(') ++p, r=eval(0), ++p;
        else
            while (strchr("1234567890", *p))
                r = r*10 + *(++p-1) - '0';
    } else r = eval(l+1);

    while (strchr(op[l], *p))
        r = operatie(r, eval(l+1), *(++p-1));
    return r;
}

int main () {

    freopen("evaluare.in","rt",stdin);
    freopen("evaluare.out","wt",stdout);

    fgets(expr, 100010, stdin);

    printf("%ld", eval(0));

    return 0;
}