Desmos scientific calculator isn’t open source but it is what I end up using most of the time. It just does float stuff though, it can’t handle something like (10^100+1)-10100

It also doesn’t support nearly as many features as the graphing calculator does, for some reason. But it formats everything very nicely and you can copy and paste as latex

The Chinese market already has better EVs than Tesla for cheaper afaik. Teslas don’t sell well there anymore.

Blahaj.zone is an instance aimed at queer people, but it doesn’t have to prevent non-queer people from participating. I would imagine an instance aimed at women to be similar.

If you already have a (lower midrange) PC, then yes.