s='A fractal is a natural phenomenon or a mathematical set that exhibits a repeating pattern that displays at every scale'
result = 12
Which values occur exactly three times?
Sorted highest to lowest?
Replace multiples of 5 with NaN
Given a 4x4 matrix, swap the two middle columns
Find the Sum of the Series:
Calculate the centroid of a triangle
Find matrix of indices for multidimensional matrix.
Find the product of the positive elements above the main diagonal.
Check if a string starts with another string
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