[TheRealPomax]

What would you use it for? And that's a serious question: what would you use it for, as opposed to just using wolfram alpha or some other service that can already get you all the answers, analysis, and more, without having to mine MathML from random pages on the internet?

[magnio]

In the past, I used a math search engine[0] to find solutions for Olympiad problems, especially inequality ones. I imagine it would be useful when you want to find the name of some formulas or expressions that you came across, though probably not much more.

[0] My typical query: https://approach0.xyz/search/?q=OR%20content%3A%24a_%7Bn%2B1...