$\frac{1}{9}^{-2}\cdot\frac{4}{5}^1$
$.5^2$
$m^2+3m-27$
$3y=14+y$
$\left(7y^3+2z^2\right)^2$
$\left(2b^2+3c^4\right)^2$
$12x-13-x-9+10x$
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