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.
Determine if a Given Number is a Triangle Number
Volume of a Parallelepiped
Determine if input is a perfect number
Saving MATLAB session to a file
Multivariate polynomials - emulate symbolic form
Negation the hard way
Multivariate polynomials - convert monomial form to array
Outer product of multiple vectors
Find vampire numbers
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