If you don't have an agent heavy workflow, you'd be surprised how far the 20$ subscription stretches. I used ~500$ of usage in the last month on a team 20$ plan.
People really need to read Dijkstras Go to statement considered harmful letter [1]. If the obscurity of go to for static analysis of the code was too much, of course bringing in a literal ai black box is harmful for stable processes.
And yet the average intelligence continued to rise through the reduction in numeracy. What job do you have where your performance is graded by your "raw intellect" instead of capability? A student?
If you have a problem with the math notation, you should open a law book, and look at the terminology mess they have going on. I like math notation, because it can be simply converted into natural language, thus removing the notation from the equation and leaving pure logic. Once you have that, thinking about it and working out what the original notation actually meant should be on you, that's how you build an understanding of math.