$\lim_{x\to1}\left(\frac{6}{\ln\left(x\right)}-\frac{7}{x-1}\right)$
$\frac{s}{\left(s+1\right)\left(s+1\right)}$
$9\frac{dy}{dx}=u$
$\frac{dx}{dt}=2e^{x-2t}$
$2ax^2\:+\:12ax\:+\:18a$
$-2x+5<x+14$
$3p+2p-4p+3-2$
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