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.
Most nonzero elements in row
Summing Digits within Text
Distance walked 1D
Make a simplified barcode
Matrix with different incremental runs
Multivariate polynomials - overload multiplication
Multivariate polynomials - emulate symbolic form
Multivariate polynomials - convert monomial form to array
Outer product of multiple vectors
Negation the hard way
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