$\int3x\ln4xdx$

$\lim_{x\to\infty}\left(\frac{\sqrt{x}}{3x-1}\right)$

$log_{\left(9\right)}\left(2n^2-14n\right)=log_{\left(9\right)}\left(-45+n^2\right)$

$\left(-5a^3-2a^2\right)+\left(6a^3+9a^2+8a\right)$

$\frac{8^3+27y^3}{2x+3y}$

$\frac{2x^2+13x+16}{x+5}$

$\frac{d}{dx}\frac{2x^2-4x}{x^5+5x+3}$