LaTeX is not just a "program" but a document preparation system. To use it, you typically download a distribution like and an editor like TeXstudio .
Those who want LaTeX quality without having to learn all the coding commands. Key Features: Allows you to see the formulas as you type them.
LyX is a "What You See Is What You Mean" (WYSIWYM) editor. It uses the power of LaTeX in the background but provides a graphical interface.
Writing entire theses, scientific papers, or books with many formulas. Key Features:
If you just have a , stick with the built-in Word Equation Editor .