Create a custom block which expands a factorised polynomial! Specifically, a polynomial (in terms of the variable x) in which each linear term is represented by a pair of items in the "constant terms" and "coefficients of x" lists with the same index. The custom block should then output the coefficient of each power of x in the resulting expanded polynomial in ascending order in the list labelled "coefficients of powers of x".
See inside if you want to see an example.
