The following procedures seems to be missing steps for handling CSSMathClamp: - [create a sum value](https://drafts.css-houdini.org/css-typed-om-1/#create-a-sum-value) - [serialize a CSSMathValue](https://drafts.css-houdini.org/css-typed-om-1/#serialize-a-cssmathvalue) - [equal numeric values](https://drafts.css-houdini.org/css-typed-om-1/#equal-numeric-value) - [reify a math expression](https://drafts.css-houdini.org/css-typed-om/#reify-a-math-expression)