$x^2-1>3$
$4a^2+24a+9-16a^2-12$
$y=-20x^{-5}$
$620-58$
$\int\frac{x+1}{x^3-x^2-2x}dx$
$y=2\sin\left(\frac{1}{2}x-\frac{\pi}{4}\right)$
$x^2-\frac{8}{3}x+\frac{16}{9}^2$
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