$x^2\frac{dy}{dx}+xy=4x$
$\frac{\left(x\right)}{2x+10}>1$
$w^2\:+21w$
$\frac{24xy}{6}$
$sinx=\frac{3}{\sqrt{10}}$
$-2^2c+\:7a^2-\:3a^2+\:10a^2$
$x-12^2$
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