View Compilation Error

0_0_20220836_3971.cpp:1:1: error: 'include' does not name a type
 include <iostream>
 ^
0_0_20220836_3971.cpp: In function 'int main()':
0_0_20220836_3971.cpp:6:11: error: 'cin' was not declared in this scope
     while(cin>>n)
           ^
0_0_20220836_3971.cpp:8:9: error: 'cout' was not declared in this scope
         cout<<(n*n*n+5*n+6)/6+<<endl;
         ^
0_0_20220836_3971.cpp:8:31: error: expected primary-expression before '<<' token
         cout<<(n*n*n+5*n+6)/6+<<endl;
                               ^
0_0_20220836_3971.cpp:8:33: error: 'endl' was not declared in this scope
         cout<<(n*n*n+5*n+6)/6+<<endl;
                                 ^