Look Sharp 4
When you take a photo on a digital camera, it not only stores the photo, but it also stores a whole lot of information about when the photo was taken, what camera it is, the aperture, shutter speed etc. This is know as metadata. A group called IPTC set up the standard for how it is stored.
The clue was I Published This Cache = IPTC. So you need to look at the photo with some photo software and find what I have hidden in the metadata.
You can also find it by opening the photo with Notepad and scanning your way through, but I wouldn't recommend it.
When you find the string, split it into syllables and Google it. Any numbers in the string mean that number times what comes immediately afterwards (as in algebra 2y means 2 times y).