$q^2+2q+2q^2$
$\lim_{x\to-6}\frac{x+3}{x+6}$
$\lim_{x\to3}\left(\frac{2x}{x-3}\right)$
$f\left(x\right)=\frac{5}{2}x-3$
$6\sin\left(3x\right)=0$
$\left(x^{-2}+5\right)^3$
$5x-15\le35x+165$
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