I know that my experience is worth more than this 20$, but I'm new to freelancer so I would like to start with any kind of job, and hopefully, get a good review from you :)
Relevant Skills and Experience
I've finished college about computer science year ago, so my math skills are still pretty good and fresh. I'm also working as a python programmer for a 2,5 year now.
Proposed Milestones
$15 USD - Describing math and meaning of python commands in the script
$5 USD - Answering to the your additional questions about script