![Integral of x to the power of x; caption "Maths, [probably something like, 'It doesn't work, b***s']"](adho-maths-recreation.png)
The original was posted as an external image, which was gone before either xkcdsw.com or Web Archive could get it. Unfortunately, I also don't seem to have a copy (and it looks like I directly edited the comic rather than putting my edits into a new layer). The following is my guess as to what the comic was, based on my edits (posted by adho):
Posted with the comment "Ok, ok, non-elementary functions. I think it's funny. 54"
[I'm concluding that there was some longer line at the bottom from closely examining the JPEG artifacts in my comic, since both adho's and the original xkcd were low-quality JPEGs.]