What's Changed
* Add standard operators and functions by younesStrittmatter in https://github.com/AutoResearch/equation-tree/pull/26
* chore/docs: add documentation on metrics/refactor package by younesStrittmatter in https://github.com/AutoResearch/equation-tree/pull/27
**Full Changelog**: https://github.com/AutoResearch/equation-tree/compare/v0.0.27...v0.0.28