Make the following variable:
The third element in the test-suite does not match the image in the problem description.
Back to basics 14 - Keywords
Number of 1s in a binary string
Whether the input is vector?
Check if equal
Area of a triangle
07 - Common functions and indexing 3
07 - Common functions and indexing 4
06 - Matrix Equations 2
03 - Matrix Variables 1
07 - Common functions and indexing 1
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