in the kindle sample - there are no .svg at all. they have been replaced with .gifs
( that's looking at the sample downloaded to K for PC then moved into calibre and converted for examination )
seems someone at amazon , or the publisher, realised what a pain in he posterior those svg constructs are, and had them replaced before putting the book up for sale.
so I shall buy the full version from amazon and move on.
( it was an interesting lesson ( in SVG, not in calculus! )
https://smile.amazon.co.uk/Calculus-...al-text&sr=1-1