Email your sincerely; change of topic etc.

Email your sincerely; change of topic etc.
 

Are my sentences correct English?:

-Dear Teacher,

After looking through/viewing/checking out the presentation topics, I find that none of them is suitable for me; can I apply for a change of topic? I would like to present on a literary work/a reading as usual, in which case a student can talk about anything relevant as he wishes. Since the presentation takes up/accounts for only several percent/a small part/a small percentage of the final score, it would not be too much unfair to other students. But if you think it necessary, you can deduct some of the marks for giving me this special permission/privilege. Thank you. I look forward to your favourable reply.

Your sincerely (I don't know whether we can use this in an email)
XF

I've edited your text to make it sound a bit more natural.

Thank you~

1. For 'I would like to present on a literary work/a reading', the meaning here should be 'to talk about', rather than putting on a performance; do you think I learned the wrong thing? I thought ON must be there to show the idea of ABOUT.

2. For 'a student can talk about anything relevant as she wishes.', do you not think omitting RELEVANT would float the idea that the student could give himself more rein than he ought to/more freedom than necessary?

You didn't learn it wrong. I misunderstood. Both 'present on' and 'talk about' could be used, although I would go with the latter because it isn't as high a register.
If you want to rein it in, just use 'relevant' without the 'as he wishes' part.

Thank you~