$6c+d=-2$
$9x^2\:-\:1$
$\frac{-52abc}{-4ab}$
$\lim_{x\to0}\frac{\sin\left(5z\right)}{3z}$
$\lim_{x\to\infty}\left(x^3\ln\left(x\sin\left(\frac{1}{x}\right)\right)\right)$
$\frac{x\:-\:4}{x^2\:-\:8x\:+\:16}$
$2x^2+11x+12=0$
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