Seldom see useage like that, very instructive.
This is what interesting should looks like.
Which values occur exactly three times?
Remove the polynomials that have positive real elements of their roots.
Energy of a photon
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Convert array of decimal numbers into binary numbers array.
Put all numbers in a string inside square brackets
Sort rows of a matrix
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