$4\:-\:2x\:\ge4$

$\frac{d}{dx}\left(y=cos\left(2x\right)\right)$

$\frac{d}{dx}5\sqrt{x^2+7}$

$\int\:x^{17}lnxdx$

$\frac{\sin\left(2y\right)siny}{\cos\left(y\right)-cos^3\left(y\right)}$

$\left(d-a\right)^2\left(d+a\right)^2$

$\lim_{x\to\infty}\left(\frac{8x}{8x+1}\right)^{9x}$