Additional test cases have been added.
liuliu:you "regexp" everything,everywhere? LOL
Least common multiple of many numbers
Sum of first n terms of a harmonic progression
Sort numbers by outside digits
Determine Whether an array is empty
Remove the positive integers.
Determine if input is a perfect number
Compute the intersect point of line and plan
Return fibonacci sequence do not use loop and condition version 2
Put m balls into n boxes
Determine if input is a Narcissistic number
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