$\lim\:_{x\to\:\:1}\left(\frac{\sqrt{x+8}+3}{x-1}\right)$

$\left(5a-3b^{4}\right)\left(5a+3b^{4}\right)$

$\frac{\frac{x}{3}+14\le\:3x+24}{\frac{x+1}{3}+10\le\:29}$

$+1+2+6+5$

$\left(-3+5-8\right)\cdot\left(-6+1\right)+\left|\left(-2+9-1\right)\cdot\left(-8+2\right)\right|$

$2x^4+3x^3-2x^2-x$

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