Return x by differentiating it.
I'm confused by this problem. It requires the use of diff() and asks for differentiation, but it tests for equality with the input variable...
the author had proposed lots of questions with meaningless test. i despise this behavior
Return the 3n+1 sequence for n
Return elements unique to either input
Who has power to do everything in this world?
Compare two input matrices
Remove collinear points in a set of 2D points defining a polygon
Find the diagonal of the square of side L
Non trivial identities - reshape
Area of polygon
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