solutions are rounded in a somewhat arbitrary fashion...
Your value of pi is wrong.
The problem should specify that the used value for pi is 3.1416 (since this is not its true value), and that we need to use floor with precision of 4 decimal places.
Remove the air bubbles
Remove NaN ?
Return unique values without sorting
Create an anti-identity matrix
Is it prime?
Create sequnce 1 4 9 16 25.........
Output a vector which is table of 9
Delete blanks at the end of string
Moore-Penrose pseudoinverse of matrix
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