Meaning: Discuss in some detail
Example: They refused to GO INTO exactly what was wrong.
Meaning: Enter a profession, hospital, trade, market
Example: She WENT INTO banking after she'd finished university.
Meaning: Begin a speech or description
Example: He WENT INTO a long attack on the way press had handled the issue.
Meaning: Be dedicated or devoted
Example: A lot of time and effort WENT INTO this book.
Meaning: Be contained in a larger number
Example: Five GOES INTO sixty 12 times