I don't have G+, so I'm guessing. IIUC the submitted link goes to a slideshow over a unrelated G+ post. Maybe C.W. saw the thumbnail of the slideshow from the other post, clicked "see/expand" and got the slideshow in the overlay.
The unrelated post with the blue dome is 7u73y5FzEZY
The actual post with the 163 equations is 7enyPxZW3RB
The direct link is https://plus.google.com/101584889282878921052/posts/7enyPxZW...
I don't have G+, so I'm guessing. IIUC the submitted link goes to a slideshow over a unrelated G+ post. Maybe C.W. saw the thumbnail of the slideshow from the other post, clicked "see/expand" and got the slideshow in the overlay.
The unrelated post with the blue dome is 7u73y5FzEZY
The actual post with the 163 equations is 7enyPxZW3RB
So if we change the URL to this, we can get the best link: https://plus.google.com/101584889282878921052/posts/7enyPxZW...