$30^2$
$\log_x\left(2116\right)=2$
$4x^212xy^2+9^4$
$\left(\frac{1}{4}\right)^{-4}$
$-209-373$
$4v^2-4v+1$
$\frac{2x^4-7x^3+7x^2-13}{x-2}$
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