$$\lim_{x \to 0^-}\left(\frac{\log{\left(\frac{\left(3 x + 1\right) \tan{\left(4 x \right)}}{2 x + 1} \right)} \operatorname{asin}{\left(3 x \right)}}{\sqrt{x + 7} - \sqrt{7}}\right) = -\infty$$
Más detalles con x→0 a la izquierda$$\lim_{x \to 0^+}\left(\frac{\log{\left(\frac{\left(3 x + 1\right) \tan{\left(4 x \right)}}{2 x + 1} \right)} \operatorname{asin}{\left(3 x \right)}}{\sqrt{x + 7} - \sqrt{7}}\right) = -\infty$$
$$\lim_{x \to \infty}\left(\frac{\log{\left(\frac{\left(3 x + 1\right) \tan{\left(4 x \right)}}{2 x + 1} \right)} \operatorname{asin}{\left(3 x \right)}}{\sqrt{x + 7} - \sqrt{7}}\right)$$
Más detalles con x→oo$$\lim_{x \to 1^-}\left(\frac{\log{\left(\frac{\left(3 x + 1\right) \tan{\left(4 x \right)}}{2 x + 1} \right)} \operatorname{asin}{\left(3 x \right)}}{\sqrt{x + 7} - \sqrt{7}}\right) = \frac{2 \log{\left(2 \right)} \operatorname{asin}{\left(3 \right)} + \log{\left(\tan{\left(4 \right)} \right)} \operatorname{asin}{\left(3 \right)} - \log{\left(3 \right)} \operatorname{asin}{\left(3 \right)}}{- \sqrt{7} + 2 \sqrt{2}}$$
Más detalles con x→1 a la izquierda$$\lim_{x \to 1^+}\left(\frac{\log{\left(\frac{\left(3 x + 1\right) \tan{\left(4 x \right)}}{2 x + 1} \right)} \operatorname{asin}{\left(3 x \right)}}{\sqrt{x + 7} - \sqrt{7}}\right) = \frac{2 \log{\left(2 \right)} \operatorname{asin}{\left(3 \right)} + \log{\left(\tan{\left(4 \right)} \right)} \operatorname{asin}{\left(3 \right)} - \log{\left(3 \right)} \operatorname{asin}{\left(3 \right)}}{- \sqrt{7} + 2 \sqrt{2}}$$
Más detalles con x→1 a la derecha$$\lim_{x \to -\infty}\left(\frac{\log{\left(\frac{\left(3 x + 1\right) \tan{\left(4 x \right)}}{2 x + 1} \right)} \operatorname{asin}{\left(3 x \right)}}{\sqrt{x + 7} - \sqrt{7}}\right)$$
Más detalles con x→-oo