$\lim_{x\to0}\left(\frac{\left|x\right|}{x}\right)$

$5\cdot\left(1^4\right)$

$x^2-3x-5=0$

$\left(\frac{h}{d}-0.6\right)^{\frac{1}{2}}\cdot\left(d^{2.5}\right)\cdot1.83=0$

$\frac{8x^5}{12x^2}$

$\lim_{x\to\infty}\left(\frac{\sqrt{4x^2-3x}}{2x-5}\right)$

$\lim_{x\to\frac{\pi}{4}}\left(\frac{\left(x-\frac{\pi}{4}\right)^2}{\left(\tan\left(x-1\right)^2\right)}\right)$