$\left(\frac{1}{x^5}\sqrt[3]{y}\right)^{\frac{-3}{5}}$

$\lim_{x\to4}\left(\frac{x^2-16}{x^2+4x}\right)$

$\lim_{x\to\infty}\left(\frac{\ln\left(3+2e^x\right)}{x}\right)$

$\cot\left(x\right)\cdot\sec\left(x\right)=\cot\left(x\right)\cdot\csc\left(x\right)$

$\lim_{x\to\infty}\left(\frac{8x+5}{64x^3+x^2-5x}\right)$

$2.24<4.17k-6.1$

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