Additional test cases have been added.
liuliu:you "regexp" everything,everywhere? LOL
Return the 3n+1 sequence for n
Angle between two vectors
Sum of diagonal of a square matrix
Duplicate a character
Create a Matrix of Zeros
Return fibonacci sequence do not use loop and condition version 3
Find the right number make the equation
Put m balls into n boxes
Project Euler: Problem 14 Longest Collatz sequence(harder version)
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