$\int\frac{8}{x^2\cdot\sqrt{4-x^2}}dx$
$\frac{3x^2+5x-4}{x+3}$
$\int\frac{2x^2-x+1}{x^4-4x^2}dx$
$a:184\:c:513$
$rewrite$
$\lim_{x\to0}\left(\frac{\ln\left(x+2\right)}{x^2+5x+4}\right)$
$2\cdot4^2$
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