$\arccos\left(\cos\left(-0.1259345715\right)\right)$
$a^2b\left(a^4b^2\right)$
$513+489+725+111$
$25x^2-36=0$
$\frac{36x^0y-6}{72x^{-1}y^{-4}}\left(-3\right)$
$\frac{9v^2z^4-4vz}{-2v^2z^4}$
$2\sin^2x-3\sin x-3=0$
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