Almost exactly as the title says.
I ran a search with the search query
is:answer 0,. Fine, search works. I got to page 2 of the results and discovered that HDE 226868's answer to "Could a manned maneuvering unit provide artificial gravity?" is rendered incorrectly.
A section that is text when you look at the actual answer is rendered in the results as MathJax, and several sections of actual MathJax are rendered as plain text.
The same thing happens on page 3 of the same results.