7.14.3 Can you answer these questions?

7.14.3.1 Understanding the behavior of HypergeometricPFQ
7.14.3.2 recursively find StringCases
7.14.3.3 How to specify custom Loss function for Predict
7.14.3.1 Understanding the behavior of HypergeometricPFQ

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=244963

this is my very post here, so I apologize for any possible format issue. 
I am using HypergeometricPFQ functions (more exactly $_3F_2$) as approximants for other more complicated functions. Here are ... 
[special-functions]
 
asked by avg https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=79519 1 vote
7.14.3.2 recursively find StringCases

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=244663

Can I recursively extract  StringCases[]  that match a specific pattern? 
Here is a minimalist example (not my actual problem): 
 
input 
... 
[pattern-matching] [string-manipulation]
 
asked by Conor Cosnett https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36681 2 votes
7.14.3.3 How to specify custom Loss function for Predict

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=244702

How can I use Predict[Xs->Ys, Method->"NeuralNetwork"] to predict 90%-quantile (instead of  mean value)? 
Utility Function does not work well for this case, because 
 
it assumes ... 
[machine-learning]
 
asked by Artem Vorozhtsov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=61755 2 votes