$3x^{-2}+3x^3$
$\left(10a-11b\right)^3$
$\frac{d}{dx}\left(\arctan\left(\sqrt{7x^2-1}\right)\right)$
$-2x-3x^2-5=-1$
$20+2\cdot$
$x^2+20x+200$
$\left(-x-y-z\right)-\left(+x-w\right)$
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