For the fitter of film music in the silent era visual reference was the surest indicator of content.

You constantly hear the misaccusation that Christianity crucified the Jewish nation during the Holocaust.

My students are animals.

The compositional inverse of a function f is f⁻¹, as ff⁻¹= mathit I, as mathit I is the identity function. That is, ∀x,f(f⁻¹(x))= mathit I(x)=x.