$\frac{d}{dx}x^3+y^3=8xy$
$-89+\left(-1\right)$
$4x^2-6x+1=0$
$\lim_{x\to0}\left(\frac{\tan\left(x\right)}{x-\sin\left(x\right)}\right)$
$\sqrt{3a^2+x^2}=5b^2$
$\frac{4x-2}{2x+1}$
$\left(x^5+3x-2x^3+6x^2-3x+4\right)-\left(-x^5+3x+4\right)$
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