View Compilation Error

0_0_29875149_12104.cpp: In function 'int main()':
0_0_29875149_12104.cpp:5:38: error: 'n' cannot be used as a function
    while(cin>>n)  cout<<n*n*n(n*n*n-1)/2-(6*n*n*n-6*n*n)<<endl;
                                      ^