The problem description and test suite have been improved.
Return elements unique to either input
Vectorize the digits of an Integer
Implement simple rotation cypher
Side of an equilateral triangle
Rounding off numbers to n decimals
Form a square matrix from four square sub-matrices
Count given word x in text.
Solve expression III
Find Euclidean norm of given vector u.
Calculate roots of polynomial given as vector array.
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