$\sec\left(x\right)=8.2$
$\:\int\frac{\:2x^2-1}{x^3-x}dx$
$29\cdot13$
$\frac{3x+1}{7}-\frac{2-4x}{3}$
$\sqrt{x+6}=\sqrt{4x-3}$
$\frac{dy}{dx}=x^3-x$
$\lim_{x\to0}\frac{6x^2+e^{-4x}}{-8x^2+x}$
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