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

((5*x^2+7)*D(x) (3*x^3)-3*x^3*D(x) (5*x^2+7))/(25*x^4+70*x^2+49)