$\lim_{x\to-4}\left(\frac{256-x^4}{4+x}\right)$
$z^2-5z+6$
$\int_1^4\left(\sqrt{4x^2+1}\right)dx$
$0.56+-2.9$
$0,04+0,2$
$f\left(x\right)=2x^2+10x+12$
$2\left(x-1\right)\left(x-3\right)>0$
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