#include <iostream>
#include <fstream>
#include <cassert>
#include <cinttypes>
#include <iomanip>
#include <algorithm>
#include <vector>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <cmath>
#include <climits>

using namespace std;

typedef int64_t i64;
typedef uint64_t u64;
typedef int8_t i8;

typedef int64_t i64;

ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

string expr;

i64 do_multiply(int* idx);
i64 do_term(int* idx);

i64 do_add(int* idx) {
    i64 res = do_multiply(idx);
    while (*idx < expr.size() && (expr[*idx] == '+' || expr[*idx] == '-')) {
        if (expr[*idx] == '+') {
            (*idx)++;
            res += do_multiply(idx);
        }
        else {
            (*idx)++;
            res -= do_multiply(idx);
        }
    }

    return res;
}

i64 do_multiply(int* idx) {
    i64 res = do_term(idx);
    while (*idx < expr.size() && (expr[*idx] == '*' || expr[*idx] == '/')) {
        if (expr[*idx] == '*') {
            (*idx)++;
            res *= do_term(idx);
        }
        else {
            (*idx)++;
            res /= do_term(idx);
        }
    }
    return res;
}

i64 do_term(int* idx) {
    i64 res = 0;
    if (expr[*idx] == '(') {
        (*idx)++;
        res = do_add(idx);
        (*idx)++;
    }
    else {
        while (*idx < expr.size() && expr[*idx] >= '0' && expr[*idx] <= '9') {
            res = res * 10 + (expr[*idx] - '0');
            (*idx)++;
        }
    }
    return res;
}

int main()
{
    fin >> expr;
    
    int idx = 0;
    fout << do_add(&idx);
    return 0;
}