Pages included in another page and duplicate content issues for SEO

You could use the NOINDEX, FOLLOW meta robots tag on the this ‘stack’ page, or the individual pages.

<META NAME="ROBOTS" CONTENT="NOINDEX, NOFOLLOW">

This lets search engines crawl the page and all links on it, but they will not index the page and so any content on it won’t get counted as duplicate content.

The code goes within the <head> section of the pages source code. You can easily define the code using plugins such as Yoast SEO or Ultimate Noindex Nofollow Tool II