$4+12+28$
$8^4\cdot8^2$
$\sin^2\left(a\right)$
$5a+10$
$f\left(x\right)=\frac{x^{2}\left(x-9\right)^{3}}{\left(x^{2}+9\right)^{2}}$
$\sin^{2}\theta\cos^{2}\theta$
$\left(\frac{x^{-3}y^{-2}}{x^{-2}y^3}\right)^{-3}$
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