$\lim_{x\to5}\left(\frac{25-x^{2}}{3-\sqrt{x^{2}-16}}\right)$

$x^3y-y^3$

$\frac{dy}{dx}\left(\frac{\left(xsinx\right)}{lnx}\right)$

$3\sin\:^2\left(4x\right)-2-\cos\:^2\left(4x\right)=0$

$y^4+32y^2+256y=0$

$\sqrt[10]{5^{10}}$

$\lim_{x\to2}\left(\frac{9x^2-36x+36}{2-x}\right)$