You need to fix some issues: you only have one test working, you are rounding to 3 decimal places, and the last test case is false (it should give 502.655)
also you shouldn't use isequal when you use pi.
Make a checkerboard matrix
middleAsColumn: Return all but first and last element as a column vector
Return 'on' or 'off'
03 - Matrix Variables 3
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