//1610612741, 1000000007
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
//#pragma GCC optimization ("O3")
//#pragma GCC optimization ("unroll-loops")
//#pragma GCC optimize ("Ofast")
//#pragma GCC target ("avx,avx2,fma")
#include <bits/stdc++.h>
using namespace std;
#define all(s) s.begin(), s.end()
#define ok puts("ok")
#define ll long long
#define pb push_back
#define mk make_pair
#define fr first
#define sc second
#define vi vector < int >
#define pi pair < int, int >
#define pii pair < int, pi >
#define next next123
#define left left123
const int N = 2e5 + 7;
const int INF = 1e9 + 7;
ll S1, S2, S3, S4;
int h[N], d[N], sz[N], mn[N], rev[N], dp[N], mns[N], total[N];
int n, m, csz;
vi g[N], despawn[N], spawn[N];
void precalc (int v, int p = 0){
h[v] = h[p] + 1;
sz[v] = 1;
mn[v] = h[v];
for (int to : g[v]){
if (!h[to]){
precalc(to, v);
sz[v] += sz[to];
mn[v] = min(mn[v], mn[to]);
}
else {
mn[v] = min(mn[v], h[to]);
}
}
}
void calc1 (int v){
for (int to : g[v]){
if (h[to] - h[v] == 1){
calc1(to);
S1 += 1LL * (csz - sz[to] - 1) * sz[to];
}
}
S1 += 1LL * (csz - sz[v]) * (sz[v] - 1);
}
void calc2 (int v){
int temp = INF;
for (int to : g[v]){
if (h[to] - h[v] == 1){
calc2(to);
mns[h[v]] += mns[h[to]];
total[v] += total[to];
mns[h[to]] = 0;
temp = min(temp, mn[to]);
}
}
if (temp != INF && temp != mn[v])
spawn[temp].pb(v);
for (int it : despawn[h[v]])
total[v] -= dp[it];
despawn[h[v]].clear();
for (int it : spawn[h[v]]){
total[v] += dp[it];
despawn[mn[it]].pb(it);
}
spawn[h[v]].clear();
mns[mn[v]]++;
dp[v] = sz[v] - 1 - mns[h[v]] + total[v];
S2 += 1LL * (csz - sz[v]) * dp[v];
}
bool comp (int a, int b){
return mn[a] > mn[b];
}
void calc3 (int v){
rev[h[v]] = v;
for (int to : g[v]){
if (h[to] - h[v] == 1){
calc3(to);
S3 += 1LL * sz[to] * ((h[v] - mn[v] - 1) * (h[v] - mn[v]) - (h[v] - mn[to] - 1) * (h[v] - mn[to])) / 2;
S3 += 1LL * sz[to] * (mn[v] - mn[rev[mn[v] + 1]]) * (h[v] - mn[v] - 1) - (mn[rev[mn[to] + 1]] - mn[v]) * (max(0, h[v] - mn[to] - 1));
}
}
S3 += 1LL * (h[v] - mn[v] - 1) * (h[v] - mn[v]) / 2;
S3 += 1LL * (mn[v] - mn[rev[mn[v] + 1]]) * (max(0, h[v] - mn[v] - 1));
}
void calc4 (int v){
int s = 0;
sort(all(g[v]), comp);
for (int to : g[v]){
if (h[to] - h[v] == 1){
if (mn[to] < h[v])
S4 += 1LL * (h[v] - mn[to]) * s;
s += sz[to];
calc4(to);
}
}
}
main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n >> m;
for (int i = 1; i <= m; i++){
int a, b;
cin >> a >> b;
g[a].pb(b);
g[b].pb(a);
}
for (int i = 1; i <= n; i++)
if (!h[i])
precalc(i);
for (int i = 1; i <= n; i++){
if (h[i] == 1){
csz = sz[i];
calc1(i);
calc2(i);
calc3(i);
calc4(i);
}
}
//cout << S1 << ' ' << S2 << ' ' << S3 << ' ' << S4 << endl;
cout << S1 + 2LL * (S2 + S3 + S4);
}
