Thanks for the correction. I had wanted to get to it earlier, but as you know, there is always more to do in a day then time allows.

Of note: The author portion is linear (15 minutes = 50%), but the split of the curation between curators is sqrt, with the earliest voters getting more "help", but the sheer voting SP by the bots almost always takes the cake.

Here is the author portion simplified.

https://steemit.com/utopian-io/@steempytutorials/part-12-how-to-estimate-curation-rewards