(edited by @nex3)

• Proposal
• Specs
• Dart Sass
• LibSass
• Documentation

Sass, by default, has a very limited set of math functions. Some functions which are missing, but would be of use:

• sqrt
• pow
• mod
• log

This functionality can be added with third-party gems, but the fact that they're missing from the core just makes everything more difficult out-of-the-box.

There is very little benefit to keeping mathematical functions out of the core, because they have a standard, expected definition, so they're not really cluttering the namespace.