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Mainly because of the internet not failing me, of course, I hardly have all LaTeX commands memorized. For what it's worth, though, the tool works extremely well whenever I test it.
Mathpix has some great utility but I feel like the niche of the products doesn't perfectly overlap. That said, I've found use for Mathpix (mainly to save some time) but haven't found a symbol via the symbol seeker that a quick google search didn't also bring up as well.
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