Preparing for Presentation

I'm a graduate student and then my major is mechanical engineering at PNU, Pusan National University.
Coming this Friday, I have to present a progress of my research in front of audiences who are three Professors and graduate students studying at other university.
I spend my time on preparing a PT, but I still make a PT. I must show my PT to my professor, so I make an effort to attract their interesting. In addition, My PT is shown logically.
I want to finish making a PT by tomorrow.

Preparing for Presentation

I'm a graduate student and my major is Mechanical Engineering at PNU, Pusan National University.

Coming this Friday I have to present a progress of my research in front of an audience that includes Professors and graduate students from other universities.

I spend my time on preparing a presentation. I must show my presentation to my professor so I am making an effort to attract their interest. In addition, my presentation is shown logically.

I want to finish making my presentation by tomorrow.

Notes:

when speaking about your major in school it's usually capitalized as a proper noun.

Audience does not need to be plural. You are talking about one audience (which includes different people) not multiple audiences.

I changed the sentence about who will be in your audience. It is more natural to either write the sentence the way I did with out any numbers or include both how many professors and how many students. ex. Which includes two professors and one student

I spend my time on preparing a PR, but I still make a PT. I am not clear on what you are trying to communicate with this sentence.

Good luck!