That's what I am talking about in my original question. If you don't include the information that theta is a function of time, then you cannot take a time derivative. As you can see below, the solution you propose does not allow for derivatives because Mathematica loses the information on what it would be with respect to:
My question could be split into two or three, maybe simpler questions, any could solve my problem.
- Is there a way to tell Mathematica that theta is a function of time without it being displayed in the output
- Is there a way to format the output so that all the [t] are hidden
- Is there a way to manipulate the resulting matrix to remove all of the [t]'s and then display that I've tried this by using variations of
P1a //. [t] :> null
The reasoning for all of this is that I need to present my results. Of course, I can convert everything to LateX and rewrite it all more legibly, but for what I am doing, just presenting a well-annotated notebook would be perfect, except that the resulting output is so long that it becomes illegible and difficult to fit on a page. Being able to state at the beginning that there is an f(t) and then omitting it afterward is a standard way to help with readability.
