$2a^4-\:\:4a^2b^2+2b^4$

$\frac{dy}{dx}\left(\frac{\left(x^2\right)}{x-4}\right)$

$\frac{3}{2}=\frac{\sin\left(2x\right)}{\sin^2\left(x\right)}$

$b^{-2}$

$\frac{1}{4}\left(sin\left(\frac{1}{8}\right)cos\left(\frac{1}{64}\right)+sin\left(\frac{3}{8}\right)cos\left(\frac{9}{64}\right)+sin\left(\frac{5}{8}\right)cos\left(\frac{25}{64}\right)+sin\left(\frac{7}{8}\right)cos\left(\frac{49}{64}\right)\right)$

$\left(3x\:-\:49^2\right)$

$4\sin^2x\left(\cos\left(x\right)\right)=\cos\left(x\right)$