$\frac{m^2+7}{m-7}$
$\int\frac{t}{t+1}dt$
$x^2+6x+13<0$
$\int\sqrt{e^t-3}dt$
$\lim\:_{x\to\:0}\left(\frac{3x^2-6x}{2e^x-2x-2}\right)$
$6a^{x-1}+8a^{x-1}$
$\frac{dy}{dx}+5y=0$
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