9.40.2 Greatest hits from previous weeks

9.40.2.1 How to change certain pages into landscape/portrait mode
9.40.2.2 Why does \\ not return a new line in an equation?
9.40.2.3 Putting two images beside each other
9.40.2.4 Making the bibliography appear in the table of contents
9.40.2.5 How can I write cases with grouping braces on both left and right side, and split the condition into two lines in LaTeX?
9.40.2.6 bibtex vs. biber and biblatex vs. natbib
9.40.2.7 Forcing linebreaks in \url
9.40.2.1 How to change certain pages into landscape/portrait mode

https://tex.stackexchange.com/landing/r/digest?cta=question&id=337

How can I change the orientation of some pages of my document into landscape mode, while leaving the others in portrait mode (or vice versa)? 
[landscape]
 
asked by hayalci https://tex.stackexchange.com/landing/r/digest?cta=user&id=183 Score of 429
answered by rcs https://tex.stackexchange.com/landing/r/digest?cta=user&id=118 Score of 449
9.40.2.2 Why does \\ not return a new line in an equation?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=194236

\begin{equation*}\label{eq:pareto mle2} 
A_0 = \frac{1}{(\alpha+t_x)^{r+s+x}}{}_2F_1\left(r+s+x,x+1;r+s+x+1;\frac{\alpha-\beta}{\alpha + t_x} \right ) "\\\" <br> 
- \frac{1}{(\alpha+T)^{r+s+x}}{}... 
[equations] [line-breaking]
 
asked by user3714137 https://tex.stackexchange.com/landing/r/digest?cta=user&id=60029 Score of 116
answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 Score of 52
9.40.2.3 Putting two images beside each other

https://tex.stackexchange.com/landing/r/digest?cta=question&id=148438

If I want to put two images beside each other, what should I do? I have inserted a figure. But, rather than having the next figure on a new line, I want it to be beside the already inserted figure. ... 
[graphics] [floats] [positioning]
 
asked by Simplicity https://tex.stackexchange.com/landing/r/digest?cta=user&id=28871 Score of 81
answered by Masroor https://tex.stackexchange.com/landing/r/digest?cta=user&id=14103 Score of 179
9.40.2.4 Making the bibliography appear in the table of contents

https://tex.stackexchange.com/landing/r/digest?cta=question&id=8458

I need to make my (BibTeX) references section appear in the table of contents of my LaTeX document (documentclass: article), with section numbering too. 
My approach until now has been making a new ... 
[sectioning] [table-of-contents] [bibliographies]
 
asked by Genba https://tex.stackexchange.com/landing/r/digest?cta=user&id=2311 Score of 239
answered by lockstep https://tex.stackexchange.com/landing/r/digest?cta=user&id=510 Score of 182
9.40.2.5 How can I write cases with grouping braces on both left and right side, and split the condition into two lines in LaTeX?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=240868

The code I used to write 
is this one 
$$ 
X(m,n)= 
\begin{cases} 
x(n),\\ 
x(n-1)\\ 
x(n-1) 
\end{cases} 
$$ 
But I don't know how to write this one 
Also, what if I want to write this 
[math-mode] [cases]
 
asked by MaryA~ https://tex.stackexchange.com/landing/r/digest?cta=user&id=65856 Score of 198
answered by Ignasi https://tex.stackexchange.com/landing/r/digest?cta=user&id=1952 Score of 141
9.40.2.6 bibtex vs. biber and biblatex vs. natbib

https://tex.stackexchange.com/landing/r/digest?cta=question&id=25701

I've heard of many different bibliography-related packages/platforms/?. What's the difference between the following, which is good for what tasks, advantages/disadvantages, which one is the most ... 
[bibliographies] [biblatex] [bibtex] [natbib] [biber]
 
asked by doncherry https://tex.stackexchange.com/landing/r/digest?cta=user&id=4012 Score of 636
9.40.2.7 Forcing linebreaks in \url

https://tex.stackexchange.com/landing/r/digest?cta=question&id=3033

This question led to a new package: 
xurl 
I wish to typeset some relatively long URLs in a piece of text, and when I use \url{..}, the resulting text does not respect the margin boundaries that govern ... 
[line-breaking] [urls]
                                                                                  

                                                                                  
 
asked by Suresh https://tex.stackexchange.com/landing/r/digest?cta=user&id=103 Score of 344
answered by Suresh https://tex.stackexchange.com/landing/r/digest?cta=user&id=103 Score of 249