$-x^2-x^2-x^2$
$\left(\sqrt{x}+4\right)^2\:+\left(\sqrt{x}-4\right)^2$
$\frac{3x^2-2x+7}{x+1}$
$\frac{d}{dx}\arctan\sqrt{e^{2a}-1}$
$\int2\left(5-2x\right)^{\frac{1}{2}}dx$
$42\times\left(\frac{3x-3}{6}\right)$
$\left(-3-5x\right)^2$
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