$\left(\left(3n-1\right)\cdot\left(n-3\right)\right)$
$3x-5=3x+8-x$
$-3\left(x-5\right)^2-12$
$2b\left(2a+5\right)+3\left(2a+5\right)$
$mcm\:de\:11$
$-\infty e^{-\infty}-e^{-\infty}$
$x^2+6x+25$
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