$\frac{d}{dx}\left(x+2\right)^4\left(4x-7\right)^3$

$\frac{d}{dx}\left(\frac{3-\cosh\left(x\right)}{3+\cosh\left(x\right)}\right)$

$\lim_{x\to0}1-\sqrt{1-x^2}$

$w^4-3w+5.w-1$

$log2\left(log2\left(logx\right)\right)=3$

$25a^2-16b^2$