$\left(3r-4z\right)\left(-4z-3r\right)$
$43+51+65-94+12-86$
$896,045-67,276$
$\left(3x^2-3x\right)+\left(2x-2\right)$
$-13x^2+160x+284$
$\lim\:_{x\to\:-\infty\:}\left(\frac{2x^2-7x\:+3}{x^3-9x^2+5}\right)$
$\left|-2\right|+\left|-3\right|\:$
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