over of almost every calculus textbook). Computing derivatives
  accurately and rapidly will make learning calculus in high
  dimensions easier. The following rules are crucial.</p>

  <ul>
    <li>Power rule {$(x^n)' = nx^{n-1}$}</li>

    <li>Sum and difference rule {$(f\pm g) = f'\pm g'$}</li>

    <li>Product {$(fg)' = f' g + fg'$} and quotient rule
    {$\ds\left(\frac f g\right)' = \frac{f' g - fg'}{g^2}$}</li>

    <li>Chain rule (arguably the most important) {$(f\circ g)' =
    f'(g(x))\cdot g'(x)$}