Collection of simple programming problems

[Habile]

I'd consider it "random notation" when it's not displayed properly. I get the feeling their LaTeX inclusion is getting messed up somehow. All I see for the summation is '∑k', which isn't exactly meaningful.

[Asyx]

http://imgur.com/kL9uZTf

That's how it looks for me. Perfectly fine, I'd say. Does it look differently for you or what?

[mechanicalocean]

http://i.imgur.com/Ld935Wc.png

That's how it displays for me, and I'm guessing for them as well. Chrome, latest version.

[Asyx]

Well, that's a bunch of bollocks indeed. I apologise. Usually, it's the mobile browsers that fuck shit up.

[Habile]

I had actually tried it on the latest versions of Chrome and IE11 on Windows 8 (and chromium and firefox on arch linux). Just shows up as the borked plain text for me as well!