$\left(b+4\right)\left(b-10\right)$
$\lim_{x\to3}\left(-3x+12\right)$
$4x^2+2\le0$
$\sin\left(3x+\frac{\pi}{18}\right)-1$
$\left(3x-10\right)\left(3x+10\right)$
$-\:4x^2\:+\:8\:=\:0$
$\left(x+2y+4z\right)^2$
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