s='A fractal is a natural phenomenon or a mathematical set that exhibits a repeating pattern that displays at every scale'
result = 12
Return the 3n+1 sequence for n
Sort a list of complex numbers based on far they are from the origin.
Find the dimensions of a matrix
Replacing a row
Sum positive elements of matrix.
Return the amount of palindromes (words) in the string.
Find Adjacency Matrix
Solve the following system of equations.
Return ! if array element starts with a certain letter. Otherwise return ?
Find the sum of the negative elements under the main diagonal.
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