Log linearizing in Smets Wouters (2007)

Dear community,
I am having the RBC model analyzed for Smets and Wouters (2007), and I found the problem at the level of the log linearization section, especially at the level of the linearized inflation equation (number 32).
I would be very grateful for any help.

You need to provide a detailed question. Your current post is too generic and vague.

Dear Johannes,
You will find attached a picture showing the starting equations and the result of log linearization.
My problem is how they did it.
Yours sincerely

It’s complicated. A starting point may be DSGE_mod/Derivation_Recursive_Pricing_Equation.pdf at master · JohannesPfeifer/DSGE_mod · GitHub

All I need is the process and I will proceed with the practice. There is a shortage in the works that allows the presentation of the training of mathematics of this age. This is my next project.
Thank you for responding me.