« first day (263 days earlier)      last day (1484 days later) » 

3:24 PM
There was an answer by François G. Dorais which used this macro (defined in the question) - I have edited it: math.stackexchange.com/posts/171287/revisions
\ul is a prefix of \ulcorner - this problem is solved by the query with regex or by this query: data.stackexchange.com/math/revision/1071496/1323755/…
It found the answer containing \ulam mentioned above.
And also two posts which contain \uline - however without definition of this macro anywhere on the page: math.stackexchange.com/questions/1925670/… math.stackexchange.com/questions/674971/…
The first query found one comment which contains \old - probably just a typo, I do not see the definition of the macro \old on the page.
they wrote $\mathbb{E} (\ln p(X,Z |\theta)$ which agree with your expresssion, note that expectation depends on the distribution that you consider, in this case the distribution is $P(Z|X, \theta^{\old})$. — Siong Thye Goh Jul 21 '17 at 18:06
 

« first day (263 days earlier)      last day (1484 days later) »