$\cos\left(cos^{-1}u-tan^{-1}v\right)$
$\frac{a^3b^2\cdot\left(ab^4\right)^{-1}a^{-4}}{ba^{-1}}$
$y'=\frac{3x}{y+4}$
$4\left(x\:+\:4\right)$
$216m^{12}+864m^8$
$\lim_{x\to0}\left(\frac{\sin6}{\cos5}\right)$
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