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

⇒ calculus.differentiation.deriv-of-poly

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