$\lim_{x\to4}\left(\frac{x-3}{\sqrt{x+1}-2}\right)$
$\frac{dy}{dx}y=\frac{1}{\left(3x-2\right)}$
$16x^2-8x+126$
$\left(9-6+3\right)-2-\left(8-7+1\right)$
$-1^2+5$
$\lim_{x\to25}\left(\frac{x^2-625}{\sqrt{x}-5}\right)$
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