I'm a novice programmer trying to do some rudimentary math & statistics.
When I come across standard math formulas, I usually need to convert the mathematical notation to either computer code (i.e. Python) or Excel syntax.
For example, someone mentioned using the normal equation in a related post: Basic Exponential Regression.
"...you can get variable $a$ directly from the normal equation:"
$$a=\frac{\sum_{i=1}^n x_iz_i } { \sum_{i=1}^n x_i^2 }=\frac{\sum_{i=1}^n x_i \log(21-y_i)} { \sum_{i=1}^n x_i^2 }$$
Question:
Are there any recourses that contain mathematical formulas that are written in computer code? (paid or unpaid)