Sort complex numbers into complex conjugate pairs.
Input x = [3-6i -1-4i -1+4i 3+6i]
Sorted output = [-1 - 4i -1 + 4i 3 - 6i 3 + 6i]
Remove the polynomials that have positive real elements of their roots.
Calculate the derivative of a polynomial
Sum of the Matrix Elements
Duplicate a character
Remove entire row and column in the matrix containing the input values
Symmetry of vector
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