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.
Extract leading non-zero digit
Reverse the vector
Construct a string from letters and counts
Back to basics 6 - Column Vector
Multivariate polynomials - overload multiplication
Find all vampire fangs
Negation the hard way
Multivariate polynomials - emulate symbolic form
Outer product of multiple vectors
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