I'm trying to render KaTex equations with Prince XML.
PrinceXML with Katex has some problems.

example equation below:
$$\int _{ i=4.509 }^{ i=f(x) }{ g(i)di } $$

$${R}_{ff}={R}_{cc}(1-\frac{{\tan}(\beta_{k})}{{\arccos}(\beta_{d}+\Delta\theta)})$$

Attach a result of Chorme and a result of PrinceXML.

1. equation_chorme_with_katex.pdf‎ 12.3 kB
2. equation_princexml_with_katex.pdf‎ 20.0 kB

We are aware of this unfortunate sizing issue that affects fractions and hope to fix it in a future release.

Thank you. I'll be looking forward to it.