Please don't use tangent and sine functions
Not a general solution. Passes only due to small number of cases in the Test Suite.
Duplicate each element of a vector.
Generate a string like abbcccddddeeeee
Given a 4x4 matrix, swap the two middle columns
03 - Matrix Variables 3
Perfect Square or not
Modified run-length companion vector
Upper Matrix Mock
Rotate matrix by -90 degrees
Refresh your system of equations
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