$y=a{x}^n$ maka $y^{\prime }=a.n.x^{n-1}$

${\displaystyle \frac{dy}{dx}}={\displaystyle \frac{dy}{du}}.{\displaystyle \frac{du}{dx}}$

$y=u.v\to y^{\prime }=u^{\prime }.v+u.v^{\prime }$

$y=u.v.w\to y^{\prime }=u^{\prime }.v.w+u.v^{\prime }.w+u.v.w^{\prime }$

${\displaystyle \frac{dy}{dx}}={\displaystyle \frac{{\displaystyle \frac{dy}{dt}}}{{\displaystyle \frac{dx}{dt}}}}$