Return x by adding a random number to it.
There is a serious disconnect between the problem statement and what is actually being tested.
Convert a vector into a number
Say something funny
Area of a circle
vector to string
Create an array (n,n) where only diagonal elements are '1' and others are '0'
Geometrical meaning of determinant
Non trivial identities - reshape
Non trivial identities - differentiation
Simple polynomial evaluation
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