bob is addicted to PCTeX (cheap $35), but his Rome research group uses the free TechnicCenter backed up by the free MikTex underneath. Download and install MikTex, then download and install TechnicCenter in that order. See below.
For immediate online use, no need to install anything, great for students:
Overleaf is excellent, I have used it!
https://www.overleaf.com
Go to the site
Create an
account
Start
writing your LaTeX document
[you can download the source too, as well as uploading multiple files
including graphics for a more complicated document; this also allows collaborative editing
online]
Overleaf also has the Beamer presentation alternative to Powerpoint presentations,
creating a PDF presentation with easy and prettier math than Microsoft cares
about:
https://www.overleaf.com/learn/latex/Beamer
A step by step learning guide for Beamer is available in the terrific PCTeX
LaTeX Quick Start Manual, also terrific
for starting to LaTeX from scratch.
Overleaf also allows you to include graphics files in many formats (.pdf, .eps, .jpg, etc) although to be used professionally only the first two are universal. Maple can export graphs to all three of these formats elegantly annotated using its drawing tools to produce the graphics files for math topics. The .jpg files can be used on the web.
Other online latex sites:
ShareLatex, online latex! very easy:
http://www.sharelatex.com >>>
https://v2.overleaf.com/login
Authorea is similar site: https://www.authorea.com/
Help video: https://www.youtube.com/watch?v=x-IFkJc0ofo
For presentations with math, you want to forget MS Powerpoint and use the Latex beamer software. An example of such a presentation is here.
PCTeX for windows (abandoned by retired creator): http://www.pctex.com [ask Najib, bob still uses this primarily]]
Free MikTeX (but needs a frontend): http://www.miktex.org
Free Frontend: TechnicCenter: http://www.texniccenter.org/ <<<< my Italian research group uses this
Free Frontend: TexWorks: https://www.tug.org/texworks/ [an alternative, sometimes bob needs this instead of the techniccenter]
Free TeXShop for MAC:
http://pages.uoregon.edu/koch/texshop/ but go to this site:
http://www.tug.org/mactex/mactex-download.html)
Tex Live! bob
usees this for his book which has complicated cross-referencing pushed to the
PDF output
[compared
to MikTex]
For help, just Google "latex superscripts" for example, and it will probably take you right to the relevant Wiki page.
Wiki Latex: https://en.wikipedia.org/wiki/LaTeX this describes what this is
Wiki how to Latex:
https://en.wikibooks.org/wiki/LaTeX best online LaTeX manual
more technical stuff:
Wiki list of Tex editors: https://en.wikipedia.org/wiki/Comparison_of_TeX_editors
LaTeX Project: https://www.latex-project.org/
MathJax: https://www.mathjax.org (for latex on web pages) [but][use latex for web page formulas! see below]
How to typeset with large images, etc. [Overleaf blog]
MathJax [https://www.mathjax.org] lets you include LaTeX code in web pages.
Here is a test page.