For a given square matrix x and scalar a, find x^a without using '^' or 'mpower'.
Find the longest sequence of 1's in a binary sequence.
Swap the input arguments
Sophie Germain prime
Moving average (variable kernel length)
Return area of square
Replace multiples of 5 with NaN
Count up then down
Apply a function array to an array of numbers
Get ranks of values in a vector
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