#include<fstream>
//#include<string.h>
using namespace std;

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

char s[100010];
int p;

int termen();
int factor();

int expresie(){
    int sum = termen();
    while(s[p]=='+' || s[p]=='-'){
        if(s[p] == '+'){
            p++;
            sum+= termen();
        }
        else{
            p++;
            sum-= termen();
        }
    }
    return sum;
}

int termen(){
    int prod = factor();
    while(s[p]=='*' || s[p]=='/'){
        if(s[p] == '*'){
            p++;
            prod*= factor();
        }
        else{
            p++;
            prod/= factor();
        }
    }
    return prod;
}

int factor(){
    int val=0, semn=1;
    while(s[p] == '-'){
        semn = -semn;
        p++;
    }
    if(s[p] == '('){
        p++;
        val = expresie();
        p++;
        return semn*val;
    }
    while(s[p]>47 && s[p]<58){
        val = val*10 + s[p] - 48;
        p++;
    }
    return semn*val;
}


int main(){

    fin.getline(s, 100010);

    fout << expresie();

    fin.close();
    fout.close();

    return 0;
}