$3x^2-1=-2x$
$-2\cdot9-4$
$-2^2-\left(-2-1\right)+-1^2$
$11x+12^3\:$
$\lim_{x\to2}\left(x^2-5x-1\right)$
$14.707+25+3.401$
$22+1+7$
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