$\lim_{x\to-2}\left(3\right)^{x+4}-2$
$49a^2-14ab+b^2$
$7x^2-14x+28$
$\left(5x-33y\right)\left(5x-26y\right)$
$\frac{2}{3}x+4\:\ge x+1$
$\sin\left(x\right)\cdot cos\left(x\right)=0$
$4\:x\:\left(-123\right)$
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