For a given square matrix x and scalar a, find x^a without using '^' or 'mpower'.
Sum all integers from 1 to 2^n
Similar Triangles - find the height of the tree
Is the Point in a Triangle?
Create an 'arrow-head" matrix
Is it a number?
Flexible Anonymous Function
Replace multiples of 5 with NaN
Get ranks of values in a vector
Handle to an array of functions
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