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.
Each comes in a carrying case that keeps the devices together with their accessories: the miniplug cable for your music or DVD player, for example, and the adapters for quarter-inch phono jacks and dual-pronged airplane armrest jacks.
You may be ashamed of your ownself, to disturb People at this Time of Night.
If unforbid thou maiſt unfould What we not to explore the ſecrets, ask Of his eternal empire.
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