$x2+6x-9=0$
$sinx+tanx+tanx\left(cosx+1\right)$
$\sqrt[7]{\frac{d}{b^2}}$
$9v^2-42vy+49y^2$
$\left(u+23\right)\left(u-1\right)$
$\frac{x^3-7x^2+5x+1}{x-1}$
$\left(\frac{2}{a}\right)^{12}$
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