$\lim_{x\to0}\left(\arcsec\left(\frac{\left(4-4\cos\left(x\right)\right)}{\sqrt{3}x^2}\right)\right)$

$\frac{\sin^2\left(x\right)}{\cot^2\left(x\right)}+\sin^2\left(x\right)=\tan^2\left(x\right)$

$x-6\le3x+12$

$3+sec^215^{\circ}-cot^275^{\circ}$

$-21:\:-5$

$\frac{x^{15}}{x^{10}}$

$\frac{\cos\theta}{\sin\theta+1}$