What are three things that the government has implied it can do that aren't specifically delegated powers in the Constitution? Example: The government on various occasions has implied it can draft so

What are three things that the government has implied it can do that aren't specifically delegated powers in the Constitution?  Example: The government on various occasions has implied it can draft soldiers into the army as it has the delegated power of raising an army.  Discuss three more of these implied powers.