# Is this the right community for "under-the-hood" math questions?

I've posted a few questions in the Mathematics Stack Exchange community asking about theoretical concerns, such as "Why is $$\frac{\frac{1}{x}}{\frac{1}{x^2}+1}=\frac{x}{x^2+1}$$ true for all $$x$$?" Oftentimes on that community, such a question gets closed because it is "off topic." There is usually no referral made to a more appropriate forum/community, just closing, even if there is an answer posted already. Because I have not had much success with the Mathematics Stack Exchange community, I've decided to try this one. Is theoretical math on topic for MathOverflow, or do I need to post elsewhere? If so, where?

• this is the only question of yours that has been closed on MSE, isn't it? so I'm unsure what you mean by your "not having had much success with the Mathematics Stack Exchange community". Feb 13, 2021 at 22:26