$\frac{x+2ax+a^2}{mx+ma}$
$4\:+\:5\:+\:16$
$\left(-6x^3+2x^2-x+3\right)\left(2x+1\right)$
$0,2\:abc-2,5cba+0,75bac+5acb$
$\:\left(+16\right)\:-\:\left(-21\right)\:-\:\left(+38\right)\:-\:\left(-25\right).$
$-7+3+2+7$
$\frac{d}{dx}-2x^2+8$
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