7.12.2 Greatest hits from previous weeks

7.12.2.1 How to add a front-end to the free Wolfram Engine?
7.12.2.2 How to express trigonometric equation in terms of of given trigonometric function?
7.12.2.3 What's the most difficult multidimensional integral that Mathematica has solved?
7.12.2.4 Standard deck of 52 playing cards in curated data?
7.12.2.5 Even Fibonacci numbers
7.12.2.6 How do I clear all user defined symbols?
7.12.2.7 How to perform a multi-peak fitting?
7.12.2.1 How to add a front-end to the free Wolfram Engine?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=198839

https://blog.stephenwolfram.com/2019/05/launching-today-free-wolfram-engine-for-developers/ 
 
http://www.wolfram.com/engine/ 
 
The Free Wolfram Engine for Developers is available for pre-production ... 
[front-end] [free-wolfram-engine] [jupyter-notebook]
 
asked by Alexey Golyshev https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=23402 65 votes
answered by Alexey Golyshev https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=23402 55 votes
7.12.2.2 How to express trigonometric equation in terms of of given trigonometric function?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=434

How can I express a trigonometric equation / identity in terms of a given trigonometric function? 
 
using following trigonometric identities 
 
... 
[functions] [trigonometry]
 
asked by Prashant Bhate https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=99 30 votes
answered by Simon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=34 37 votes
7.12.2.3 What's the most difficult multidimensional integral that Mathematica has solved?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=222184

I am interested in benchmarking numerical integration methods and am trying to develop a wider set of difficult multivariate examples. For my particular methods, I only want to look at non-negative-... 
[calculus-and-analysis] [numerical-integration]
 
asked by ben18785 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=19278 6 votes
7.12.2.4 Standard deck of 52 playing cards in curated data?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=16108

I am not sure how to find out what all is included as curated data. For example, are the individual images of each of the 52 cards in a standard deck of playing cards included? 
 
If not, is there a way ... 
[curated-data]
 
asked by JohnD https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1629 25 votes
answered by rm -rf https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5 23 votes
7.12.2.5 Even Fibonacci numbers

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=37266

Today, I found the Euler Project. Problem #2 is 
 
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 
... 
[number-theory] [project-euler]
 
asked by xyz https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9627 34 votes
answered by rcollyer https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=52 46 votes
7.12.2.6 How do I clear all user defined symbols?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=850

Is there some way to do this other than going to  Evaluation -> Quit kernel  and firing a new one up? 
[variable-definitions] [symbols] [faq] [clear] [persistence]
 
asked by niklasfi https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=82 99 votes
answered by Artes https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=184 98 votes
7.12.2.7 How to perform a multi-peak fitting?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=26336

I am wondering how to implement the multi-peak detecting and fitting in Mathematica. Following is an example of fitting the data using three peaks (such that the data ~ peak1 + peak2 + peak3). 
The ... 
[fitting] [data] [peak-detection]
 
asked by Everett You https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1389 55 votes
answered by Silvia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=17 55 votes