$230,7+62,5$
$75x^2-30x+3$
$2n\cdot2^1$
$3x^2-8x-27=0$
$\int\frac{7}{x^2+3x-10}dx$
$\left(5x+2\right)\left(5x-8\right)$
$\frac{d}{dx}\frac{\sqrt{s}-1}{\sqrt{s}+\:1}$
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