Assuming you’re seeing the same issue as me: I find the parenthesis spacing is messed up whenever there are unnecessary \left and \right, as there are in some o

Assuming you’re seeing the same issue as me: I find the parenthesis spacing is messed up whenever there are unnecessary \left and \right, as there are in some of the samples, which leads to an extra <mrow> in the MathML. If you only use those when they really need to stretch, then it looks much better.