In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

[EX Q]: sum of the squares of the reciprocals of this function evaluated at the nonnegative integers is equal to the modified Bessel function of the first kind at x=2. The Leviathan Number is found by evaluating this function at 10 to the 666th power. The rising type can be represented with the Pochhammer Symbol. Wilson's Theorem states that this function of any prime minus 1 is also congruent to -1 modulo that prime. Legendre's theorem provides a corollary to determine the number of (*) trailing zeroes of this function evaluated at nonnegative integers. When this function is evaluated at large numbers, Stirling's approximation is used. The gamma function extends this function to all complex numbers other than negative integers. For 10 points, name this function that, for positive integers n, is the product from 1 to n, and which is represented by an exclamation point.
[EX A]: Science

[EX Q]: title character of one of his operas sings of being a ruler in "Del pi sublime soglio", which sees Vitellia sing of her anger and grief in "Deh se piacer" and "Non pi di fiori. " For 10 points each: [10] Name this composer of La Clemenza di Tito and Il Re Pastore, both works with libretto by Metastasio.
[EX A]: Fine Arts

[EX Q]: All fundamental solutions of this result are generated from pairs of relatively prime integers which aren't both odd. Most proofs use either similarity arguments, the dissection of plane figures, or shears; the latter being the case in Proposition 47 of Euclid's Elements. For ten points, what theorem was demonstrated by Leonardo da Vinci and James Garfield, but was first proven 2500 years ago
[EX A]:
Science