$$\lim_{x \to 0^-}\left(\frac{\left(3^{\sin{\left(7 x^{2} \right)}} - 1\right) \operatorname{acos}^{2}{\left(7 x \right)} \log{\left(\tan{\left(3 x \right)} + 1 \right)}}{x^{7} - 7 x}\right) = 0$$
Más detalles con x→0 a la izquierda$$\lim_{x \to 0^+}\left(\frac{\left(3^{\sin{\left(7 x^{2} \right)}} - 1\right) \operatorname{acos}^{2}{\left(7 x \right)} \log{\left(\tan{\left(3 x \right)} + 1 \right)}}{x^{7} - 7 x}\right) = 0$$
$$\lim_{x \to \infty}\left(\frac{\left(3^{\sin{\left(7 x^{2} \right)}} - 1\right) \operatorname{acos}^{2}{\left(7 x \right)} \log{\left(\tan{\left(3 x \right)} + 1 \right)}}{x^{7} - 7 x}\right)$$
Más detalles con x→oo$$\lim_{x \to 1^-}\left(\frac{\left(3^{\sin{\left(7 x^{2} \right)}} - 1\right) \operatorname{acos}^{2}{\left(7 x \right)} \log{\left(\tan{\left(3 x \right)} + 1 \right)}}{x^{7} - 7 x}\right) = \frac{3^{\sin{\left(7 \right)}} \log{\left(4 \sqrt{3} + 7 \right)}^{2} \log{\left(\tan{\left(3 \right)} + 1 \right)}}{6} - \frac{\log{\left(4 \sqrt{3} + 7 \right)}^{2} \log{\left(\tan{\left(3 \right)} + 1 \right)}}{6}$$
Más detalles con x→1 a la izquierda$$\lim_{x \to 1^+}\left(\frac{\left(3^{\sin{\left(7 x^{2} \right)}} - 1\right) \operatorname{acos}^{2}{\left(7 x \right)} \log{\left(\tan{\left(3 x \right)} + 1 \right)}}{x^{7} - 7 x}\right) = \frac{3^{\sin{\left(7 \right)}} \log{\left(4 \sqrt{3} + 7 \right)}^{2} \log{\left(\tan{\left(3 \right)} + 1 \right)}}{6} - \frac{\log{\left(4 \sqrt{3} + 7 \right)}^{2} \log{\left(\tan{\left(3 \right)} + 1 \right)}}{6}$$
Más detalles con x→1 a la derecha$$\lim_{x \to -\infty}\left(\frac{\left(3^{\sin{\left(7 x^{2} \right)}} - 1\right) \operatorname{acos}^{2}{\left(7 x \right)} \log{\left(\tan{\left(3 x \right)} + 1 \right)}}{x^{7} - 7 x}\right)$$
Más detalles con x→-oo