Is LaTeX only used for typesetting math equations?

[basty]

How do you write on latex like this

$A = (1+2) * (4+7) * (2+9)$
$= 3 * 11 * 11$
$= 363$

Instead of this?

$A = (1+2) * (4+7) * (2+9) = 3 * 11 * 11 = 363$

How do you align at = in Latex?

I would like to use Latex which is used in physicsforums in my PC. Please send me the download link.

Thank you

 

[Simon Bridge]

The double backslash gets you a newline, and you can align equations using the "align" environment.
A multiplication sign is \times.
You can also size the parentheses.

What you asked for:
$$A=(1+2)(4+7)(2+9) \\=3\times 11\times 11 \\= 363$$

Using the align environment and sizing the parentheses:
$$\begin{align} A &=\big(1+2\big)\big(4+7\big)\big(2+9\big) \\ &=3\times 11\times 11 \\ &= 363 \end{align}$$

If you are going to be using LaTeX more (recommended) then you'll need a decent guidebook:
https://tobi.oetiker.ch/lshort/lshort.pdf < this is what I use
http://latex.wikia.com/wiki/Main_Page < wiki format

 

[Hawkeye18]

For LaTeX on PC, the standard and probably easiest way to go is Miktex It contains the latex engine, simple editor and previewer.

 

[Simon Bridge]

Oh yeah...
http://latex-project.org/ftp.html
... see the latex project for more.

There's also a short intro on the help page...
https://www.physicsforums.com/help/

LaTeX is a complete document typesetting system, not just for typesetting maths.
Using it in place of the built-in equation editor in a wysiwig editor like word is a bit more involved.

I use commandline with TexLive myself... but then it comes with the os.