$\lim_{x\to0}\left(\frac{e^{4x}-1}{\tan\left(2x\right)}\right)$

$\lim_{x\to25}\left(\frac{\sqrt{x+5}}{25-x}\right)$

$\int\frac{\left(x^2+x+1\right)}{\left(x^2+1\right)}dx$

$x^3+6x$

$\lim_{x\to0}\left(\frac{e^x+e^{-x}-2}{1-\cos\left(x\right)}\right)$

$\sqrt{44a^3b^7c^9}$

$1+13$