S3E32. Hyperbolically speaking

In this episode, while evaluating a seemingly trivial integral, we learn a valuable lesson in the words of a mathematician, Michael Atiyah (1929 - 2019), who received both the Fields Medal and the Abel's Prize: the devil will take your soul. The only question then is whether you can get your soul back or not. In another historically sweeping chain of events, there was a mathematician who never gave up his soul to the devil. Leonard Euler (1707 - 1783), a master craftsman of creatively spinning seemingly childish observations seven ways to Sunday into something that is not so trivial in the end. Thus, the moral of this story is: think before you shuffle (symbols). Separately, in this episode we also setup the stage for an introduction of the four popular hyperbolic functions by a direct analogy with their circular cousins.