Is it worth publishing a paper rephrasing what past papers did with a different mathematical framework? I work industry (I'm an engineer with a decent background in math) and for work I often read through papers and I attend conferences to keep up with the state of the art.
I've noticed there're few papers (not very recent but not very old either) whose methods can be derived in a more elegant way using other mathematical frameworks.
I was wondering if it make any sense to re-work all the math these papers did and publish them somewhere. It wouldn't be potentially having new results from these papers but just reformulating them, maybe a new reformulation might highlight new properties worth experimenting.
My question is:

Is this kind of work worth some paper submission somewhere?
If no new experiments are produced that would yield different results I wouldn't really say they are worth engineering wise (I might be wrong though), so for sake of mathematical interest is there some Journal of applied mathematics of some kind that could fit for this purpose?
I struggle to find similar work somewhere but I'm not really good with looking up math papers / applied math papers do you have any suggestion of something I can look up?
Here is my opinion and suggestion (I claim no authority).

Elegant derivations are of indisputable value, even if they are mathematically equivalent to existing results. Think of postgraduate students reading your paper and having an &quot;aha&quot; moment, for example. By contributing elegant results, you are promoting your sub-field, which could be appreciated by other researchers.
I won't be able to suggest a journal, unless we work in the same area. I doubt it is possible at all without knowing the details. There probably exists an applied mathematics / engineering journal dedicated to your topic, which leans towards mathematical aspects and has many non-experimental papers. If you want to submit a concise paper, perhaps, look for the word &quot;communications&quot;.
If searching by keywords in Google Scholar or similar doesn't yield what I want, I try the following. Crawling citations from the most relevant papers or books / volumes / series / conferences. Checking publication lists of the most relevant researchers / labs. Reading theoretical chapters of doctoral theses, which can be a good source of carefully chosen references.