4

I’m not sure what you want with just “4.” Do you mean: - Problem 4 from a set? Please paste the text of problem 4 and I’ll solve it step by step. - A quick property about the number 4? I can give a few math facts (e.g., factors, factorial, roots, logs). - A quick practice question in a subject (calculus, algebra, physics, etc.) at your level? I can generate a few. Also, tell me your subject and level (high school, undergrad, etc.) and whether you want full solutions or just the final answer.