$3\pi hp+3\pi h^2$
$5m-5n$
$a^2-8a+15$
$\left(x+5\right)\left(y+3\right)$
$\lim_{x\to4}\left(3x^2\right)$
$\left(4t+1\right)^2$
$\frac{x^{2}y^{3}}{3xy^{2}z^{4}}$
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