LaTeX is a mathematical mark-up language that enables you to post mathematical expressions. It makes it much easier to post math, but is still hard to use and much like coding. There is an easier way to type out LaTeX syntax for complicated mathematical expressions and formulas.
You will need to download and install the Daum Equation Editor (free). Inside, it will provide you a graphical editor where you can add equations and symbols with ease. At the bottom, it will display the LaTeX syntax that you will post.