#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll M=1e9+7;
ll fexpo (ll a,ll b)
{
    ll res=1;
    while (b)
    {
        if (b%2)
        {
            res*=a;
            res%=M;
        }
        a*=a;
        a%=M;
        b/=2;
    }
    return res;
}
int main()
{
     ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    ll n,a,b,t,i,j;
    cin>>a>>b>>t;
    ll ans=fexpo((a+b),t);
     j=-t;
    j%=(M-1);
    if (j<0)
        j+=(M-1);
    ans*=fexpo(2,j);
    ans%=M;
    cout<<ans<<'\n';
    return 0;
}