Retellings

I was just finishing up some of my Fluid Mechanics homework and I couldn't but help to notice that even retellings are in my Fluids homework. I could not believe that I did not know before. This retellings is that we have been using the same equations the whole semester. And every homework that we did used that equation so I guess that the equation that we used which was the Bernuli Equation is a retellings. I guess that shows you that you have not just retellings in literature but also in engineering books.