The way to do mathematics on computers is via a CAS such as Mathematica. This is misguided pornography. Unfortunately as such it shall do what its implementers intended: for a while embrace, and if not extend, embolden.

And yes, I know Wolfram Language is proprietary too, and, yes, I know Stephen Wolfram is a massive tool, and yes, I know Mathematica licenses are expensive, and yes, I am aware of probably all the criticisms you can level my way and at it and then some in various permutations thereof, but heavens, at least it isn’t this dissolute disaster otherwise known as Excel, where “numbers have a place” but they don’t need to be numbers, and they don’t need to be in a place or have a place, but they break silently whilst you run your hedge fund.

EDIT: As soon as I get my hands on this monstrosity I shall embark upon a voyage to define several lambdas within the same cell as a list, and then make other cells depend upon it, and their type too, to see how far I can push this thing until it breaks.