Symbolica 2.0: programmable symbols for Python and Rust

Oh, a release that's actually relevant to me. I'm using this to help my kids practice algebra in a vibecoded project. It works really well, though the licensing is the most annoying part - in order to use it, you need to register a license key, and it gates parallelism. It's source available rather than an open source library. Thankfully, we only need the hobbyist license, which is free and lasts for a year.