$-3x>7$
$\sec x=-5$
$\arccos\left(\frac{\sqrt{6}+1}{2\sqrt{3}}\right)-\arccos\left(\sqrt{\frac{2}{3}}\right)$
$25^2+120x+144$
$-5467+3012$
$\left(2a^2b\right)^3\left(4ab^2\right)^{-2}$
$12\:-\:\left(-1\right)$
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