Fill in the Blanks

Hello, 

I use to write chemical formulas and equations on Moodle using mhchem package of MathJax. It works great. Recently I was introduced to H5P and find it amazing. The problem now is that H5P does not recognize my Latex formulas that I used to write on Moodle. Example: I am trying to use

*2*  \(\ce{Mn^2+}\) + *4*  \(\ce{MnO4^-}\) + *6*  \(\ce{H2O}\)   \(\ce{->}\)  *8* \(\ce{MnO2}\) + *10*  \(\ce{H^+}\)

on a "fill in the blank" exercice but it does not recognize my chemical equation.

Is it possible to generate a "fill in the blanks" with tables, charts, etc.?

What I want: picture 1

How I did it: picture 2

How it looks like: picture 3

I have been using columns, fill in the blanks, interactive videos, quiz etc with great success. I am a chemistry teacher and often need to include subscript <sub> and superscript <sup> in questions/answers. Currently this functionality is not available in many editors but it would make the content so much more powerful for teaching science and maths. 

Content types; Fill in the blanks, quiz (question set), summary, essay