I searched through a bunch of sites and articles but I could not find the answer to my question anywhere. Hopefully not because of my complete search incompetence.
Is it okay to write a function in the "denominator" of Leibniz notation like this:
To mean differentiation with respect to x+2, treating x+2 as the variable. This seems extremely useful to me, especially when writing things like the chain rule; This notation makes it clear and understandable in my opinion.
Thank you for your time.