"cat" is a really nice touch for concatenation of those arrays! your solutions never fail my expectation.
by the way, i saw that "sub-func" comment...:)
Calling the two sub-functions the right way will not hurt your score. Great work though. :)
Remove all the words that end with "ain"
Make a Palindrome Number
Vectorize the digits of an Integer
Divide by 4
Find the starting index of a consecutive condition
Horizontal matrix sort
Sum of Two Numbers
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