$\frac{8x^2+16x+6}{2x+1}$

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

$\left(\frac{1}{2}m^2-4n\right)\left(\frac{1}{2}m^2+4n\right)$

$\lim_{x\to0}\left(15\tan\left(x\right)\right)^x$

$x^2+2x^3-2x^2+2x-3$

$49x^2-25$

$\int\sqrt[50]{\cot\left(x\right)}\csc^2\left(x\right)dx$