$\left(11.\infty\right)$
$2cos^2x-8=-6$
$\left(2a-b^2+3\right)^2$
$\sqrt{\log_{10}\left(n\right)}=2$
$\sqrt{144+\sqrt{25}}$
$\frac{x}{1.9}=-4.7$
$-4x\:+-6=2$
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