Differentiate.

$y=\frac{4x-3}{7x^{2}8}$

$\frac{dy}{dx}=\frac{-28x^{2}10x56}{(7x^{2}8{)}^2}$

$\frac{dy}{dx}=\frac{-28x^{2}42x32}{(7x^{2}8{)}^2}$

$\frac{dy}{dx}=\frac{84x^2-42x32}{(7x^{2}8{)}^2}$

$\frac{dy}{dx}=\frac{28x^3-56x^{2}74x}{(7x^{2}8{)}^2}$