#include <bits/stdc++.h>
#define _GLIBCXX_DEBUG
using namespace std;
using ll = long long;
using V = vector<int>;
using VV = vector<V>;
const int MOD  = int(1e9)+7;


struct mint {
  ll x;
  mint(ll x=0) : x(x%MOD) {}
  mint& operator+=(const mint a) { if ((x += a.x) >= MOD) x -= MOD; return *this; }
  mint& operator*=(const mint a) { (x *= a.x) %= MOD; return *this; }
  mint operator*(const mint a) const { return mint(*this) *= a; }
  mint pow(ll t) const {
    if (!t) return 1;
    mint a = pow(t>>1);
    a *= a;
    if (t&1) a *= *this;
    return a;
  }
};
using Vm = vector<mint>;


VV G;

Vm dfs(int k, int u, int p=-1) {
  Vm res = {1, 1, 0, 0};
  for (int v : G[u]) if (v != p) {
    auto q = dfs(k, v, u);
    q[0] *= 2;
    q[k] *= 2;
    for (int i=3; i >= 0; --i) {
      res[i] *= q[0];
      for (int j = 1; j <= i; ++j) res[i] += res[i-j] * q[j];
    }
  }
  return res;
}


int main() {
  int n; cin >> n;
  G.assign(n, V());
  for (int i = 0; i < n-1; ++i) {
    int u, v; cin >> u >> v;
    --u, --v;
    G[u].push_back(v);
    G[v].push_back(u);
  }

  auto dp2 = dfs(2, 0);
  auto dp3 = dfs(3, 0);

  mint ans = mint(2).pow(n-1) * n;
  ans += dp2[2] * 6;
  ans += dp3[3] * 6;
  cout << ans.x << '\n';
  return 0;
}