$y^{'\:}+5=2x^2$
$2-5+\left(-3\right)-\left(-4\right)$
$x^2+\left(k+7\right)x+\left(7k+1\right)$
$\frac{tan^2\left(\theta\right)-\sec^2\left(\theta\right)}{\tan\left(\theta\right)}$
$2^3.2^{-4}$
$\frac{1}{y}\frac{dy}{dx}-4x=0$
$\frac{dy}{dx}=\left(x-y-1\right)^2$
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