Thank You, Nasser.  I poorly phrased my question.  At this stage, my most basic, least ambitious question is:  How can one import the following example LaTeX article into a Mathematic Slide Show, and therefore make it look truly professional & beautiful?

\documentclass[11 pt] {article}
\begin {document}This is an example LaTeX document.    Suppose we are given a rectangle with sidelengths $ (x + 1) $ and $ (x + 3) $. Then the equation $A =  x^2 + 4 x + 3 $ represents the rectangle area.        Suppose we are given a rectangle with sidelengths $ (x + 1) $ and $ (x + 3) $. Then the equation $$A =  x^2 + 4 x + 3 $$ represents the rectangle area.        \end {document}