I honestly don't know. Wikipedia describes Marxism as left-wing. It also describes left wing as being for social equality, and right wing as believing there is an inherent natural hierarchy to the world.

So the extreme right is believing one race is better than another (e.g. Nazism).

Maxism-Leninism to me is like saying everyone is equal under comunism, except the dictator or small group running things. So sort of a merge between full socialism and Nazism? I guess politics isn't as straightforward as being able to put everything on a left/right spectrum, and I don't pretend to be an expert. I've learnt more about tankies and nazis the last week than in my whole life to that point.