$49m^6+70am^3n^2+25a^2n^4$
$\frac{x}{2}-\frac{5}{6}<\frac{7}{8}+x$
$2\log_{12}\left(x-8\right)+\log_{12}\left(4\right)=2$
$\frac{x^{-2}-y^{-1}}{y^2-x^{-1}}$
$\frac{\sqrt{x^2+7}}{2}+3=5$
$2x^2+4x-6=0$
$-18=-2x$
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