# Math with newmat

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Here some short examples of how to use math with the newmat module, which "collects macros that TeX users kind of expect to be available when typesetting math," according to the documentation. These currently include the `\frac` family (`\frac`, `\dfrac`, `\tfrac`, `\binom`, etc.), the `\QED` symbol, the `\boxed` command, and the `subarray`, `substack`, and `smallmatrix` environments, along with a few others. At one time it also included the `\text` command, though that has now been moved to the core.

\usemodule[newmat] Inline math: $x = \frac{y}{2z} + x_{\text{center}}$

Display math: \startformula q = \delta \frac{\partial p}{\partial x} = \delta(\phi) p_{vsat}(\theta) \frac{\partial \phi}{\partial x} = \left[ \frac{\delta_a}{\mu(\theta)} p_{vsat}(\theta) \right] \frac{\partial \phi}{\partial x} = k \frac{\partial \phi}{\partial x} \stopformula

Legends: \startlegend \leg k \\ water vapor permeability \\ \\ \leg K \\ water vapor permeance \\ \\ \leg S \\ surface \\ \\ \leg L \\ length \\ \\ \stoplegend

Aligned display math: \startformula\eqalign{ t_{L,\text{early}} & = t_{L,\text{late}} = t_{L,\text{ray}} \cr & = 6\ \mu m \cr }\stopformula

(These samples are adapted from an example sent to the mailing list on 2005-06-28 by Wolfgang Zillig.)