$\lim_{x\to2}\left(\frac{x^2+2x-8}{\sqrt{x^2+5}-\left(x+1\right)}\right)$

$\frac{x^{6}}{x^{6}}$

$\int\frac{1}{\left(a^2-u^2\right)^n}dx$

$3\left(10a+7\right)$

$\:\frac{d^2y}{\:dx^2}x^2y-5x=6$

$\left(2-5y^2\right)\left(2+5y^2\right)$

$\left(\frac{2}{5}x-\frac{1}{2}y\right)\left(\frac{2}{\left(5\right)}x+\frac{1}{2}\right)$