$x^2+2x+1=-4$
$\left(4x-4\right)\left(4x+5\right)$
$\int\frac{\left(x+2\right)}{x^2-x-6}dx$
$5x-1<7$
$\frac{dy}{dx}=\frac{3x^2+4x-4}{2y-4}\:,\:y\left(1\right)=3$
$y'=4x^2y$
$4+4\cdot7$
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