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.
03 - Matrix Variables 1
Upper triangular matrix
Change the first and last diagonal element of the identity matrix to zero
Flip the vector from right to left
Multiply by 3
Roots of quadratic equation
Throw common elements of two vector arrays
Delete blanks at the end of string
Moore-Penrose pseudoinverse of matrix
Output a vector which is table of 9
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