4

Not sure what you need with "4." Could you clarify? Here are some quick options I can do:

• Generate a 4-question practice quiz on a subject and level you choose (e.g., calculus, linear algebra, physics, biology, economics).
• Solve a specific problem you paste (or a problem from a set you have).
• Give you 4 key formulas or concepts for a topic.
• Create a 4-step study plan for exam prep.

Tell me the subject and level (high school, undergrad), and whether you want multiple-choice or open-ended questions. If you want, I can start with 4 short math problems right now.