$\lim_{x\to-2}\left(\frac{x^4+4x^3+5x^2+4x+4}{x^4+x^3+4x^2}\right)$
$\int\left(e^{4x}\cdot\left(2+e^{4x}\right)\right)dx$
$\left(+9\right)\:-\:\left(-16\right)$
$\:2,5a-0,4a-3,6a+4a$
$x^2-4x-12=0$
$\left(3m^2-6\right)\cdot\left(3m^2+6\right)$
$\frac{2}{3}x^2\sqrt{4x}$
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