Version 4.15.2.1

This release contains many changes that allow using Rubi as a complete Mathematica package that can be installed as Paclet. List of changes

• Automatic extraction of Rubi rules from Albert's source notebooks
• Reworking parts of the Step routine to allow for a more consistent formatting
• Implementation of new visualizations for Rubi integration steps and statistics
• Minor fixes in the integration rules

One major change for the user is that in order to see integration steps and statistics, the usage is now

Steps[Int[expr,x]]
Step[Int[expr,x]]
Stats[Int[expr,x]]

• Stats[Int[expr,var]] returns now a list {stats, antiderivative} so that you can use the statistics for inspection (instead of simply printing it).
• A minor issue with GtQ, an internal function, was fixed
• the output of Stats has now accessor for all fields:

{stats, int} = Stats[Int[expr, var]];
stats["Steps"]
stats["NumberOfRules"]
stats["InputLeafCount"]
stats["OutputLeafCount"]
stats["Ratio"]
stats["Rules"]