$\frac{\ln\left(2x+3\right)}{\frac{2}{\sqrt{2x+3}}}$

$\lim_{x\to1}\left(\frac{\left(\ln\left(n\right)\right)^2}{x-1}\right)$

$\left(7-5x\right)\left(49+35x+25x^2\right)$

$\sqrt{\left(\frac{x^2}{x-2}\right)-1}$

$\int x^6\left(\sqrt{3x^7-2}\right)dx$

$\frac{dy}{dx}=e^{-y}\left(x+e^{-x}\right)$

$\int\frac{1}{2x^2-4x+20}dx$