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

$\frac{cos\left(x\right)}{1+sin\left(x\right)}-\frac{1}{cos\left(x\right)}=-\tan\left(x\right)$

$\left(m^2n^3+m^3n^2\right)^2$

$\left(\left(\frac{a}{\sqrt{a^2+c^2}}\cos\left(x\right)\right)\left(-\cos\left(x\right)\right)\right)$

$1-12x+49x^2$

$\left(m+8n\right)^2$

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