[Open \Big/ and \Big\backslash etc are too small #261](https://github.com/w3c/mathml-core/issues/261) [Too much space around #260](https://github.com/w3c/mathml-core/issues/260) [Interaction between height and baseline alignment #259](https://github.com/w3c/mathml-core/issues/259) [Missing autofocus attribute for MathML elements #258](https://github.com/w3c/mathml-core/issues/258) [Consider support for the box-sizing property #257](https://github.com/w3c/mathml-core/issues/257)
