$-45x^2+x+8$
$\frac{dy}{dx}+4y=x^2e^{-4x}$
$\frac{dz}{dx}=e^{x.z}$
$\frac{9x^2y^2}{18x^4}18x^4y$
$\frac{3x+2}{2}\:-1\:>\frac{3x+1}{3}$
$3x^2y-2xy^2+x^2y$
$\tan\left(a\right)\sqrt{1-\sin^2\left(a\right)}=\sin\left(a\right)$
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