$a\:x\:b\:x\:c$
$\frac{\sin^2\theta-2\sin\theta+1}{\sin\theta-1}$
$x^2=9-y^2$
$4\left(x-m\right)+9m\left(x-m\right)$
$\frac{36w^{16}}{12w^6}$
$\left(8u^2+2n\right)$
$-3\:-\:\left[-9\right]$
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