Question

Помогите пожалуйста!!!! ​

Answer 1

$\frac{x^{3}}{d} -\frac{d}{x} =\frac{x^{4}}{dx}-\frac{d^{2}}{dx}=\frac{x^{4}-d^{2}}{dx} =\frac{(x^{2}-d)(x^{2}+d)}{dx}$