#include <iostream>
#include <string>

using namespace std;

int main()
{
    string a;
    string b;

    cin >> a;
    cin >> b;

    int ap[21];
    int apc = 1;
    int bp[21];
    int bpc = 1;
    int cp[42];

    int mode = 0;

    string number("");
    string power("");


    for (int i = 0; i < 21; i++)
    {
        ap[i] = 0;
        bp[i] = 0;
    }

    for (int i = 0; i < a.size(); i++)
    {
        if (mode == 0) {
            if (a[i] != '+' && a[i] != 'x')
                number += a[i];
        }

        if (a[i] == '+' || a[i] == '-')
        {
            mode = 0;
            if (number == "")
                number = "1";
            if (number == "-")
                number = "-1";
            if (power == "")
                power = "0";
            ap[stoi(power.c_str())] = stoi(number.c_str());
            number = "";
            if (b[i] == '-')
                number = "-";
            power = "";
            apc++;
            continue;
        }
        if (a[i] == 'x')
            mode = 1;
        if (a[i] == '^')
        {
            mode = 2;
            power = "";
            continue;
        }

        if (mode == 1)
        {
            power = "1";
        }
        if (mode == 2)
            power += a[i];
    }
    if (number == "")
        number = "1";
    if (number == "-")
        number = "-1";
    if (power == "")
        power = "0";
    ap[stoi(power)] = stoi(number);

    number = "";
    power = "";

    for (int i = 0; i < b.size(); i++)
    {
        if (mode == 0) {
            if (b[i] != '+' && b[i] != 'x')
                number += b[i];
        }

        if (b[i] == '+' || b[i] == '-')
        {
            mode = 0;
            if (number == "")
                number = "1";
            if (number == "-")
                number = "-1";
            if (power == "")
                power = "0";
            bp[stoi(power.c_str())] = stoi(number.c_str());
            number = "";
            if (b[i] == '-')
                number = "-";
            power = "";
            apc++;
            continue;
        }
        if (b[i] == 'x')
            mode = 1;
        if (b[i] == '^')
        {
            mode = 2;
            power = "";
            continue;
        }


        if (mode == 1)
        {
            power = "1";
        }
        if (mode == 2)
            power += b[i];
    }
    if (number == "")
        number = "1";
    if (number == "-")
        number = "-1";
    if (power == "")
        power = "0";
    bp[stoi(power)] = stoi(number);

    for (int i = 0; i < 42; i++)
    {
        cp[i] = 0;
    }

    for (int i = 0; i < 21; i++)
    {
        for (int j = 0; j < 21; j++)
        {
            cp[i + j] += ap[i] * bp[j];
        }
    }

    string res;
    for (int i = 41; i >= 0; i--)
    {
        if (cp[i] != 0)
        {
            if (cp[i] > 0 && res != "")
                res += "+";
            if(cp[i] != 1)
                res += to_string(cp[i]);

            if (i != 0)
            {
                res += 'x';
                if (i != 1)
                {
                    res += '^';
                    res += to_string(i);
                }
            }
        }
    }

    cout << res;

    return 0;
}