$\lim_{x\to-2}\left(\frac{x^3-8}{x^4-16}\right)$
$24,078+7,6$
$xy'+\frac{2}{3}y+15x^2+13=0$
$25x^2-30x\:+9$
$6sinxcosx-2$
$\left(2a-b+6c\right)^2$
$\left(\frac{2a^xm}{3b^yn^3}\right)^2$
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