$\log\left(x^2+4\right)=3log\left(2\right)$
$4x^2y+52xy-68y$
$21-3x^2\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$
$\lim_{x\to0}\left(\frac{\tan\left(2x\right)-\sin\left(2x\right)}{x^3}\right)$
$-5=25$
$\left(x^{2\:}+1\right)\frac{dy}{dx}=x\:-4xy$
$\int\sqrt{8x+3}dx$
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