$\left(9\:+\:4m\right)^2$
$\left(8a-9b\right)^2$
$\lim_{x\to0}\left(\frac{3x^2-5x}{2x^2+1}\right)$
$\frac{x^{2}}{36}+xy+9y^{2}$
$\frac{dy}{dx}=x^2-2$
$4tan\left(x\right)+8=0$
$a^2+16a+64$
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