gradschool

I'm looking to start a self-hosted blog that might have some math and code fragments in it. I've reviewed the usual suspects such as ghost and the rest of the awesome-selfhosted list on github, but math typesetting (for example in latex format) hasn't been prominently mentioned as a feature in any of them. Am I getting worked up over nothing because everybody knows you can do that with markdown or some kind of plugin for ghost? Rolling my own with mathjax or whatever wouldn't be out of the question. What would you recommend?

I spend much of my time outside the U.S. and would like people in the U.S. to be able to reach me without having to place an international call. What sim card deal would you recommend for light occasional use with a permanent number and a U.S. area code?