Exercise calculus.differentiation.quotient

Description
Use the quotient-rule to find the derivative of a polynomial. Only remove parentheses in the numerator.

Derivation

Final term is not finished

((3*x^2-1)*D(x) (2*x^3)-2*x^3*D(x) (3*x^2-1))/(9*x^4-6*x^2+1)