$\left(12m^3-7n^4\right)\left(12m^3+7n^4\right)$
$4cos^2\left(\frac{3\pi}{4}\right)-3sin^2\left(\frac{3\pi\:}{4}\right)$
$\left(x^2+xy+y^2\right)^2$
$\frac{dx}{dt}=20-\frac{x}{15}$
$x\sqrt{\left(1-y^2\right)}dx+ydy\sqrt{\left(1+x^2\right)}=0$
$h^2-12h\:+16$
$\lim_{x\to0}\left(\frac{\sin\left(2x\right)}{1-\cos\left(2x\right)}\right)$
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