$6x^2-19x-8$
$c^2-49$
$2sin\theta\:=sin^2\theta\:+cos^2\theta\:$
$m^2+10m+30=10$
$\left(-27\right)-\left(-12\right)$
$\lim_{x\to-\infty}\left(1+\frac{2}{x^3}\right)x$
$\left(3x-4\right)\left(4x-4\right)$
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