Źródło TeX:

= \lim\limits_{x\to+ \infty }\dfrac{\pi\,-2\,\text{arctg} x}{\frac1x}= \left[ \dfrac{0}{0} \right] \overset{\text{H}}{=} \lim\limits_{x\to+\infty }\dfrac{(\pi\,-2\,\text{arctg} x)'}{(\frac1x)'}