On the note of the suppliment for those that have run into this post wondering about maths, I found it at the following:
https://modwiggler.com/forum/viewtopic.php?t=93901
https://w2.mat.ucsb.edu/mat276n/resources/systems/CREATE_teachingSynth/manuals/8c_Maths2013-V1.11-printable.pdf
I believe the first one is the original source though the download link is a MediaFire one so if anyone had any qualms about that, the second link is a direct download. The original post has a black background version which I find easier to read though so that's probably the best place to go get it.
EDIT: Oh and here's an alternative panel for folks that might want something a little easier to read. I'm blind as a bat so while I like the aesthetic of the original panel, this one easier on the eyes for me:
https://www.modulargrid.net/e/grayscale-maths-v2-grayscale-black-panel
There are a few variants and it's about $25 from grayscale.info.