$3\left(-9q+9\right)+3\left(8q-3\right)$
$\int\frac{\left(\sqrt[2]{1-4x^2}\right)}{x}dx$
$4x-6$
$\ln\left(\frac{-9x-2}{x^2+12}\right)=0$
$3x-4-9x+5$
$\left(a^3-b^7\right)^2$
$\lim_{x\to4}\left(\frac{2-\sqrt{x}}{9-x}\right)$
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