$\frac{dy}{dx}=ln\left[\frac{x\sqrt{x-7}}{\left(3x-8\right)^4}\right]$
$-15x^2y\:-\:7x^2y$
$\left(sin\left(x\right)-1\right)+\left(-2sin\left(x\right)\right)\left(sin\left(x\right)-1\right)+\left(-cos^2\left(x\right)\right)$
$\lim_{x\to-\infty}\left(\frac{\sqrt{4x^4}-x}{2x^2+2}\right)$
$\frac{dy}{dx}-3x^2y^2=5x^2$
$4x^2+4x-15=0$
$-3w^2+x^2-5w+4x^2$
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