$\lim_{x\to0}\left(\frac{\sqrt{8+5x}-\sqrt{8}}{x}\right)$

$\frac{1-\sec\left(x\right)}{1-\cos\left(x\right)}=-\frac{1}{\cos\left(x\right)}$

$\left(x+10\right)\:x\left(2x-4\right)$

$29+-8+-7+6-10+-15$

$\sec^2\left(-\theta\right)-1=tan^2\left(\theta\right)$

$\frac{dy}{dx}\sqrt{\frac{\left(x+2\right)^9}{\left(4x-7\right)^{10}}}$

$\left(\frac{1}{2}x+2y\right)^3$