# Writing two partial differential equations in LaTeX

Do you know how is it possible to write this equation in LaTeX? I tried with this type, but it seems that this is not the correct version of writing.

\begin{equation}

$$K_ox=\frac{d^(2/3)_o}{n_x} \frac{1}{[\frac{\partial h_o}{\partial s}]^2}$$

\end{equation} • You don't want to use  at all. You probably mean \begin{equation} K_ox .... \end{equation}? – yo' Sep 3 '15 at 13:31
• don't use $ inside equation you are already in math mode. – David Carlisle Sep 3 '15 at 13:31 ## 1 Answer Your main error has been addressed in comments. For the rest see my MWE: % arara: pdflatex \documentclass{article} \usepackage{mathtools} \begin{document} \begin{equation} K_{ox}=\frac{d^{2/3}_o}{n_x} \frac{1}{[\partial h_o/\partial s]^{1/2}} \end{equation} \begin{equation} K_{ox}=\frac{\sqrt{d^2_o}}{n_x} \frac{1}{\sqrt{\partial h_o/\partial s}} \end{equation} or$\sqrt{\frac{\partial s}{\partial h_0}}$or$\dfrac{1}{\bigl(\frac{\partial h_o}{\partial s}\bigr)^{0.5}}$\end{document} • And, as you are suggesting at the end, rather not$d_o$and$h_o$, but$d_0$and$h_0\$. – Przemysław Scherwentke Sep 3 '15 at 13:55
• @PrzemysławScherwentke Uh, haven't even noticed. Just typed it once (with zero) and the rest was copied). Well, the OPs picture shows some "o"s so I just leave it as it is. – LaRiFaRi Sep 3 '15 at 13:57