$-42-\left(-81\right)-\left(-73\right)$
$\left(12^{14}\right)\cdot\left(12^4\right)$
$\int\:\frac{10x-2}{x^2-14x+48}dx$
$\left(9\:-\:3i\right)\:\left(\:5i\:+\:7\right)$
$\frac{x^3+125}{\:x+5}$
$\frac{1}{1-\frac{3}{2}z^{-1}+\frac{1}{2}z^{-2}}$
$\left(x-2x^2\right)^3\left(1-4x\right)$
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