]>

\log (1 + x) = \sum_{k = 1}^{\infty} \frac{{(- 1)}^{k - 1} z^{k}}{k}

b_{0} + \frac{a_{1}}{b_{1} + \frac{a_{2}}{b_{2} + \frac{a_{3}}{b_{3} + \frac{a_{4}}{b_{4}} + \dots}}}

\frac{a_{1}}{b_{1} + \frac{a_{2}}{b_{2} + \frac{a_{3}}{b_{3} + \frac{a_{4}}{b_{4}} + \dots}}}

Golden Ratio = \frac{1}{1 + \frac{1}{1 + \frac{1}{1 + \frac{1}{1 + \dots}}}}

\tan (z) = \frac{z}{1 - \frac{z^{2}}{3 - \frac{z^{2}}{5 - \frac{z^{2}}{7 - \frac{z^{2}}{9 - \dots}}}}}

\begin{matrix} f (x) & = & x^{3} - a \\ f' (x) & = & 3 x^{2} \\ f ″ (x) & = & 6 x \end{matrix}