Answer:
The part of the sentence that is not appropriate for a research paper is doesn't care speck.
Step-by-step explanation:
This part is not appropriate for a research paper not only because it's too informal - even vulgar - but also because the attitude the reader will infer. A research paper should be written in a formal register and conveying a critical analysis based on data. It should not imply that the author is right because he or she thinks so and does not care if anyone disagrees with him or her.