$\sqrt{x-1}+\frac{x^2}{x-2}$
$\left(9a-b\right)^3$
$\sqrt{2}x\sqrt[3]{2}x\sqrt[4]{2}$
$81+36p+4p^2$
$2xy+5x+6xy+3xy+-3x$
$x+2\sqrt{2xy}\left(2y\right)$
$3x+3y+12z=6$
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