[re_with_feedback] html and pdf output for long math outputs

[AakashGfude]

This issue is also present in the non-myst version of the book.

In re_with_feedback lecture. The maths output for eigenvectors in huge, and extends beyond the page for HTML:

and gets clipped off in latex:

[mmcky]

thanks @AakashGfude -- not sure how we can fix this one as they are outputs from code-cells.

We probably should look to see if that package has some formatting aspects to it so it returns the LaTeX on two lines.