I often encounter questions (or even answers!) which contains text-&-latex in an image.
Now, should I edit them even if they are 2 years old, already have an answer, just to remove the picture and replace it with LaTeX?
The advantages of replacing images with MathJax and MarkDown are:
That said, please improve the post in every other aspect as well. For questions, consider a better title, more or more accurate tags; all posts benefit from a good paragraph structure. Lastly, avoid filling the front page with heaps of edited old questions.
(Answer amalgamated from the comments.)