Mathematical implementation failing

[LunaticMaestro]

The implementation of formula recognition is failing.

Please find colab here https://colab.research.google.com/drive/1Efiu22l8ax1FgHtsLkLPVagX6UW07u-U?usp=sharing

(Reference Data attached)

Kindly suggest the following

1. How can I construct back the equations
2. Some equations components (in colab above) may be failing. Is there any recommendation ?