$\left(\frac{4}{5}xy+\frac{1}{4}\right)^4$
$9^2+9$
$\frac{4}{12}^{-2}\cdot3^2\cdot\frac{1}{3}^{-1}$
$\frac{d}{dx}x^2+xy^2$
$\lim_{x\to-3}2x^2+4x+1$
$\left(b^3+2x\right)^3$
$10x-10-6\left(x+2\right)$
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