The sorted coefficients in your example should be [1; 4; 3; -2].
The test suite is also comparing against an incorrect result in the last problem.
Sums with Excluded Digits
Back to basics 6 - Column Vector
Poker Series 05: isStraight
Is A the inverse of B?
Join Strings with Multiple Different Delimiters
Outer product of multiple vectors
Product of two multivariate polynomials
Fangs of a vampire number
Multivariate polynomials - convert monomial form to array
Find vampire numbers
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