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.
Angle of triangle
Convert String to Morse Code
Back to basics 19 - character types
Multivariate polynomials - convert monomial form to array
Outer product of multiple vectors
Find vampire numbers
Fangs of a vampire number
Find all vampire fangs
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