+90600 LaTex is a mathematics presentation language that can be used on this forum.
It is used in many other places as well.
This can be very confusing when you first use it but if you start with little things like using it to write fractions then it is easy to build your knowledge from there.
If you are interested in learning say so in a new post and we will be very pleased to help you.
I was looking for some early LaTex coding examples that were supposed to be in the sticky notes but they are displaying. 
Some of the coding does not work in this new version of the forum but I still want to be able to find these posts,
So.. I'm putting them here 
This first one I am only including for historical value, it was posted before we had LaTex here at all
http://web2.0calc.com/questions/test_6 dated 5th March 2014
Now for the real ones 
(1) This is a big one dated from dated 28th April 2014
https://web2.0calc.com/questions/latex
(2) This has good information to help get you started.
It was written by MaxWong dated 7th July 16
Thanks Max
https://web2.0calc.com/questions/a-post-of-latex
(3) Another by MaxWong dated 10th July 2016
+90600 Here is one, by GingerAle and Hectictar, that Hectictar just asked me to include. Thanks Girls :)
This is the original thread but I will includ most of the salient coding underneath.
https://web2.0calc.com/questions/1-84-1-56-8
\(\boxed{3x\stackrel{?}{=}7}\)
\boxed{3x\stackrel{?}{=}7}
---------------------------------
\(\begin{array}{|rcll|} \hline \angle {ABC} &=& 27° \\ \measuredangle{ABC} &=& 27° \\ \stackrel {\; \frown} {ABC} &=& 27° \\ \stackrel { \hspace{.1em} \wedge} {AC} &=& 27° \\ \stackrel {\, \hspace{.1em} \frown} {AC} &=& 27° \\ \hline \end{array}\\\ \overset{\; \frown}{AC} = 27° \\\)
Coding
\begin{array}{|rcll|}
\hline
\angle {ABC} &=& 27° \\
\measuredangle{ABC} &=& 27° \\
\stackrel {\; \frown} {ABC} &=& 27° \\
\stackrel { \hspace{.1em} \wedge} {AC} &=& 27° \\
\stackrel {\, \hspace{.1em} \frown} {AC} &=& 27° \\
\hline \end{array}\\\
\overset{\; \frown}{AC} = 27° \\
I only just realised that Ginger has not used the \boxed command.
I wonder how she got the vertical side lines on her box?? I'll have to work it out ://
Arr got it, it is a part of the array command.
Thanks Ginger :)
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Oh Hectictar also mentioned that there is a number of ways to get the degree sign.
These are Hectictars words:
"I have noticed that there are actually two signs that look like degree signs in the "special character" selection. One of them is a masculine ordinal indicator: º and the other is the degree sign: ° . (If you hover over the symbol it tells the name of it.)
I just use the command ^\circ Like this 5^\circ displays as \(5^\circ\)
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