Can I edit mathematical formulas as fractions, integrals, powers, functions, etc. in this program?
Everything with which I met before, breaks the mathematical equations into different lines. As a result, when I try to save in .fb2 format for an e-book, the text loses its entire structure.
Will another file format help in solving the problem? Or is this program does not designed to work with the technical focus of literature?
InCopy is intended to be a companion program to InDesign. I’m not really sure what you’re asking about, but there are math plugins and extensions available for InDesign.
It's good. Does that plugin make the formulas as an image or as text?
Could you also give an example of this plugin?
MathTools v3 from Movemen has a plugin for InDesign and InCopy that lets you enter equations as you are asking. It exports as MathML, which epub 3 understands. (Not sure what an ".fb2" file is, I've never heard of that extension. An ebook is .epub, but only InDesign can export to that format.)
Also, MathType, an equation editor that creates equations as art objects that you can place into InDesign as inline objects should also work with InCopy, since you can place art in a story in the same way.
More info on running a script to better integrate with ID (and assumably IC) here:
Very intrasting MathType program.
Can this program create math equestion in code of document, which after export to ePub will read on PocketBook? Or all math equestion will be created how image in ePub document?
I'm sorry, I don't know. Best to ask the MathType folks. They probably have a demo available for download, too.