$5-8x>-3$

$\sec\left(x\right)+\frac{1}{\cot\left(x\right)}=\frac{1+\sin\left(x\right)}{\cos\left(x\right)}$

$\frac{2x^5+31x^3-22x^2+65x-55}{2x^2+5}$

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

$\lim_{t\to1}\left(5t^4-4t^2-1\right)$

$\lim_{x\to4}\left(\frac{2-\sqrt{x}}{9-x}\right)$

$-5x\:+\:6\:+\:2x\:-\:2$