3.41.2 Greatest hits from previous weeks

3.41.2.1 Matrix in Latex
3.41.2.2 How to add a forced line break inside a table cell

Greatest hits from previous weeks:

3.41.2.1 Matrix in Latex

https://tex.stackexchange.com/questions/204621/matrix-in-latex

I am new to Latex, and I have been trying to get the matrix of following form 
[x11 x12 x13 . . . . x1n 
x21 x22 x23 . . . . x2n 
. 
. 
. 
. 
xd1 xd2 xd3 . . . . xdn] 
...
 

- asked by Lakshmi Narayanan (63 votes), answered by skpblack (100 votes)

3.41.2.2 How to add a forced line break inside a table cell

https://tex.stackexchange.com/questions/2441/how-to-add-a-forced-line-break-inside-a-table-cell

I have some text in a table and I want to add a forced line break. I want to insert a forced line break without having to specify the column width, i.e. something like the following: 
...
 

- asked by Denilson SA~\[DownExclamation] Maia (458 votes), answered by Bernard (153 votes)