I polished up this problem and added more test cases.
Remove the polynomials that have positive real elements of their roots.
Sum the numbers on the main diagonal
Write a code that will follow the equation y = x * (x + x) * x.
BASICS - sum part of vector
Find sum of negative elements in row.
Sort rows of a matrix
Logarithm with base other than 'e'
Sample from random roulette
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