$\left(-14\right)\cdot\left(-16\right)$
$9\cdot\left(6+x\right)$
$3\left(6r\right)+3\left(-7\right)+2\left(4r\right)+2\left(1\right)$
$14x^3y^4\left(-2xy^2\right)$
$\lim\:_{x\to\:2}\left(\frac{\sqrt{x+2}-2}{\sqrt{x+5}-3}\right)$
$9x^4-148x^2+64$
$4y^2+4y$
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