$8x^2-53x-21$
$\lim_{x\to\infty}\left(\frac{2}{x}-3\right)$
$\frac{dy}{dx}=\frac{\left(x-1\right)\left(y+2\right)}{\left(x+2\right)\left(y-1\right)}$
$-8x=10x$
$3x-1+.\left(x+4\right)\ge2.\left(2x-3\right)$
$a^2+16a+64$
$y''+5\cdot y'-14\cdot y=0$
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