Hello,
I am a latex publishing professional worked for many scientific and technical books.
I have about 15+ years of experience. I have worked for many US and UK publishers on LaTeX books.
I went through your requirement. Having worked on so many LaTeX books, I can assure you of well coded tex files, pdf created and checked for printer specification. I can do justice to maths as I am well aware of latex symbols and commands.
I worked for US client as latex helpdesk and help modify latex environment/macro. I also create cls/sty as per requirement.
I can create a sample file if you desire so. If you want to compile it on specific template, I can do that for you. Just let me know.
Looking forward to hearing from you!
Best,
Shashi