#include <bits/stdc++.h>

using namespace std;

ifstream f ("evaluare.in");
ofstream g ("evaluare.out");


char infix[100001],nrCurent[100001];

struct Node
{
    string info;
    Node *left,*right;
    Node(string s) : info(s),left(nullptr),right(nullptr) {}
};


int preced(char x)
{
    if(x == '+' || x == '-')
        return 1;
    if(x == '*' || x == '/')
        return 2;
    if(x == '^')
        return 3;
    return -1;
}

//void sterge_spatii(char s[])
//{
//    int k=0,n = strlen(s);
//    for(int i=0; i<n; ++i)
//        if(s[i] != ' ')
//            s[k++] = s[i];
//    s[k] = '\0';
//}

bool cifra(char x)
{
    return x >= '0' && x <= '9';
}

Node* infix_to_postfix(char infix[])
{
//    sterge_spatii(infix);

    int n = strlen(infix),k;

    stack <char> operatori;
    stack <Node*> noduri;

    for(int i=0; i<n; ++i)
    {
        if( cifra(infix[i]) )
        {
            k = 0;
            while(i < n && cifra(infix[i]) )
            {
                nrCurent[k++] = infix[i];
                i++;
            }
            i--;
            nrCurent[k] = '\0';

            noduri.push( new Node(nrCurent) );

        }
        else if(infix[i] == '(') operatori.push('(');
        else if(infix[i] == ')')
        {
            while(!operatori.empty() && operatori.top() != '(')
            {
                Node *n = new Node( string(1,operatori.top()) );

                Node *t1 = noduri.top();
                noduri.pop();
                Node *t2 = noduri.top();
                noduri.pop();

                n->left = t2;
                n->right = t1;
                noduri.push(n);

                operatori.pop();
            }
            if(operatori.top() == '(')
                operatori.pop();
        }
        else
        {
            while(!operatori.empty() && infix[i] != '^' && preced(infix[i]) <= preced(operatori.top()) )
            {
                Node *n = new Node( string(1,operatori.top()) );

                Node *t1 = noduri.top();
                noduri.pop();
                Node *t2 = noduri.top();
                noduri.pop();

                n->left = t2;
                n->right = t1;
                noduri.push(n);

                operatori.pop();
            }
            operatori.push(infix[i]);
        }
    }

    while(!operatori.empty())
    {
        Node *n = new Node( string(1,operatori.top()) );

        Node *t1 = noduri.top();
        noduri.pop();
        Node *t2 = noduri.top();
        noduri.pop();

        n->left = t2;
        n->right = t1;
        noduri.push(n);

        operatori.pop();
    }

    return noduri.top();
}


int calcul(Node *root)
{
    string s = root->info;

    if(cifra(s[0]))
        return stoi(s);

    int t1 = calcul(root->left);
    int t2 = calcul(root->right);

    if(s[0] == '+')
        return t1 + t2;
    else if(s[0] == '-')
        return t1 - t2;
    else if(s[0] == '*')
        return t1 * t2;
    else if(s[0] == '/')
        return t1 / t2;
    else if(s[0] == '^')
        return pow(t1,t2);
}

//void inordine(Node *n)
//{
//    if(n == nullptr)return;
//    if(n->left || n->right)
//        cout << '(' ;
//    inordine(n->left);
//    cout << n->info ;
//    inordine(n->right);
//    if(n->left || n->right)
//        cout << ')' ;
//}

int main()
{
    f.getline(infix,100001);
    Node *root = infix_to_postfix(infix);
    g << calcul(root);
    return 0;
}