When I first learned about Mathematica online, I was very excited about it. However, it is not a free service, but a subscription similar to normal mathematica. Moreover, everything I look up about MO is like announcements of its existence and similar, blog style stuff, but where the hell is it? How do I (as a mathematica subscriber) access it? And especially, can I make programs in it that the public can view without a subscription?
As a MWE, let's just go with this. How can I make the following visualization appear at a webpage for which I can simply share the URL and a public user can see it and manipulate the slider?
Manipulate[Plot[Sin[x (1 + a x)], {x, 0, 6}], {a, 0, 2}]
