Nice triplets

input/code.cpp: In function 'int main()':
input/code.cpp:54:43: error: expression cannot be used as a function
                 vast+=((maar[e])(maar[e]-1)(maar[e]-2))/6;
                                           ^

#include <iostream>
#include <vector>
#include <stack>
#include <queue>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <unordered_set>
#include <stdio.h>
#include <string.h>
#include <unordered_map>
#include <fstream>
#include <set>
#include <map>

#define MOD 1000000007
#define ll long long
#define N 20000
#define float double

using namespace std;

vector<int> vl[4001];

void dfs(int node, ll* maar, int* k, int dist){
    k[node]=1;
    maar[dist]++;
    for(int seur:vl[node])
        if(!k[seur])
            dfs(seur, maar, k, dist+1);
}

int main(){
    int n;
    for(int i=0; i<n; i++){
        int a,b;
        cin>>a>>b;
        vl[a].push_back(b);
        vl[b].push_back(a);
    }

    ll vast=0;

    for(int i=1; i<=n; i++){
        ll maar[4000];
        int k[4000];
        for(int i=0; i<4000; i++){
            k[i]=0;
            maar[i]=0;
        }

        for(int e=1; e<4000; e++)
            if(maar[e]>=3)
                vast+=((maar[e])(maar[e]-1)(maar[e]-2))/6;
    }

    cout<<vast<<endl;
    return 0;
}