data/examples/300.md

$$\mid \frac{1}{x}=\frac{1}{c}\mid =\mid \frac{c-x}{xc}\mid =\frac{1}{\mid x\mid }\cdot \frac{1}{\mid c\mid }\cdot \mid x-c\mid \backslash mid\backslash frac\{1\}\{x\}=\backslash frac\{1\}\{c\}\backslash mid=\backslash mid\backslash frac\{c-x\}\{xc\}\backslash mid=\backslash frac\{1\}\{\backslash left\backslash vert\; x\backslash right\backslash vert\}\backslash cdot\backslash frac\{1\}\{\backslash left\backslash vert\; c\backslash right\backslash vert\}\backslash cdot\backslash left\backslash vert\; x-c\backslash right\backslash vert$$

The factor $$\frac{1}{\left\vert x\right\vert}$$ is not good if its near 0.