I came across this question, where a user is clearly asking for help on their homework and hasn't shown effort on the problem - just stating they don't understand it.

Below the question is a comment by another user that just answers the question.

What is the best way to handle this?

• Ignore it.
• Politely let the commenter know that we should ask the OP for more information
• Leave our usual message: "Please share your thoughts on the problem so we can help you figuring out what you're doing wrong/see what your thinking it/whatever."