$\frac{dy}{dx}+\frac{12}{x}y=2x^3+7$
$\left(13x+19y\right)\left(10x-9y\right)$
$\frac{5x^3+3x^2+5x-7}{x^2+5}$
$\frac{dy}{dx}=\left(4x+6\right)\cos\left(y\right)$
$2x^2+2x-24$
$e^x+e^y+e^z=25$
$\lim_{x\to\infty}\sqrt{x+6}-\sqrt{x}$
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