$\lim_{x\to-1}\left(\frac{x^2+2x+1}{x^2+1}\right)$
$\sqrt{x}+3=12$
$3-t\frac{dy}{dt}=8$
$\int\:\frac{28s+28}{\left(s^2+1\right)\left(s-1\right)^3}ds$
$\left(4m-9n\right)^2$
$\left(-h^2+m^3\right)^3$
$0.25x^2-0.3xy+0.09y^2$
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