$\sqrt{3^{-2}}$
$\left(3x^{-3}y^4\right)^2$
$\log\left(x+2\right)=2\log x$
$4x^2-18x-70=0$
$3\sin^2$
$c^2+18c-81$
$\frac{-4x^4+8x^2+7x-3}{x-5}$
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