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

((6-5*x)*6*x^2-(2*x^3-4)*D(x) (6-5*x))/(36-60*x+25*x^2)+D(x) (4*x^2)