Pronunciation of $M(x)$ and $m(x)$ Suppose I use two functions and I denoted them by lowercase and uppercase letters $m(x)$ and $M(x)$.  Of course, I have to distinguish them somehow.
How do I read this? Is capital/uppercase $M$ of $x$ and lowercase $m$ of $x$ ok?

Yeah, whatever makes you happy and is clear. I would personally, and I feel like this is the most common, read "big M of x" and "little m of x".
