Forums Scripts & Popups Working with text inside a file (Three questions)

I got two questions about reading text from a file:
First question: I have a line of text that includes   word from time to time.
How can I cut the text that comes before that word?
(Or how can I delete it, and break the line where it was?)
Maybe by using $regsub or something like that?

Second question: I have a text file and I want to read specific line of text out of there, but the text is written backwards... How can I read the text backwards in order for it to show normaly?

Third question: How can I scan the text file I have and to remove text in brackets including the brackets?

Thanks in advance.