Click anywhere outside the box and the LaTeX should be rendered to the right of the "Click To Copy" button
Click the "Click To Copy" button and the MathML source code will be copied into your clipboard
Notes
LaTeX math is not sensitive to whitespace.
Feel free to use spaces and linebreaks wherever you like.
The textarea is also resizable.
The MathML code copied to your clipboard can be pasted (ctrl+V) into MS Word and it will render correctly.
You may notice some slight differences between the LaTeX and MS Word render. Most likely this results from a lack of curly braces "{}" as in the example provided.