$\sqrt{2}\sin\left(5x\right)=1$
$\frac{2x^3-x^2-9x+4}{x-2}$
$-1+-9+11+-20+2+-1$
$\lim_{x\to4}\left(\frac{\sqrt{2x+1}-\sqrt{x+5}}{x+4}\right)$
$\int\frac{1}{3}x^{-\frac{2}{3}}\left(x+1\right)dx$
$\left(x+19\right)^2$
$\left(6b+7\right)\left(6b-7\right)$
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