$\left(5a^2b\:-\:1\right)\left(5a^2+\:1\right)\:$
$-2x-5-3x-6-4x$
$x^2-12x-31=0$
$10-\left(6-3\right)$
$-5+3-\left(-2\right)+\left(+3\right)-\left(-7\right)$
$\int\left(\frac{6}{x^3-1}\right)dx$
$\left(\frac{1}{2}-\frac{\sqrt{3}}{2}i\right)^{15}$
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