copy and paste from test suite
Too bad the test suite doesn't provide some tolerance for testers wanting to precalculate the constant scalar values (e.g. 1/sqrt(...)) as 0.159576912160573.
Return the first and last characters of a character array
Sum the numbers on the main diagonal
06 - Matrix Equations 2
y equals x divided by 2
05 - Vector Equations 2
02 - Vector Variables 1
07 - Common functions and indexing 1
07 - Common functions and indexing 4
01 - Scalar variables
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