$\left(a+4\right)^2+5\left(a+4\right)$
$x-3\le12$
$x+6=20$
$\int\sec w\left(\sec w+\tan w\right)dw$
$\left(x^2+7x+9\right)^2$
$y=\:lm\:cos\:\frac{3x^2+5x}{2x^3}$
$y'+2y=x^2e^{-x}$
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