$x+11xy+28y^2^2^2^2^2$
$\sqrt{x}\sqrt{x^3}$
$1029-65+12-28$
$\cot\left(x\right)\sin\left(x\right)=\sin\left(x\right)$
$\lim_{t\to0}\left(\frac{\sqrt{1+8t}-\sqrt{1-4t}}{t}\right)$
$9-3+2-8+30$
$-6x^{-1}$
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