[abdullahkhalids]

It takes many dozens of hours, sometimes hundreds, to write a paper (just the writing not the technical work). People will spend a long time trying to improve the expositions. I have seen papers where co-authors have fought for weeks about the accuracy of a single sentence. I have seen papers where there were over twenty draft-revision cycles.

But there are natural limits. Usually, after working for years on a problem, you become so close to it that describing to a general technical audience is very difficult. Often, after you publish the work, someone else will do the difficult work of understanding your paper, and then write a more readable exposition as part of a review paper or book.