$\left(-432\right)+\left(1889\right)$
$169x^2117x+81$
$b^{-10}.\:\frac{b^{-1}}{b^5}$
$2\cdot\left(-3\right)-\left(-3\right)^2$
$111^3$
$\csc\left(0.8571\right)$
$m^2n^2+nm^2-2m^2n$
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