Monadic Linear Algebra

I'm trying to learn Haskell and I want to create a monad that, when you pass it two matrices, multiplies them, and then takes the inverse. But I cant figure out how, can anyone HELP ME?

(″･ิ_･ิ)っ-̾ A monad is a functor from a category to itself. Honestly, I don't know how I could make this any simpler.