Additional test cases have been added.
TIL issorted is a function also!
Project Euler: Problem 3, Largest prime factor
Remove NaN ?
Calculate the area of a triangle between three points
Permute diagonal and antidiagonal
Change the sign of even index entries of the reversed vector
Reverse digits of a number
Check if two matrices are permutations of each other
Check if a matrix is a palindrome in all directions
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