Error in test 4.
Sorry Jean-Marie, I just corrected test 4, thanks for informing :)
Finding Perfect Squares
Return the first and last character of a string
Equal to their cube
select the primes of a vector
Find offset of given matrix element from first matrix element
Find offset of an element of a multi dimensional matrix
Given an input string, generate a variable name out of it
Create a matrix with difference of each row of input matrix
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