$\frac{8h^5-32h^4+16h^3}{8h^4}$
$5x^2+7x-3x^2$
$\frac{e^2}{e^{2x}}$
$\int\pi^{2}dx$
$z^8+18z^8+144$
$\frac{x^3+5x^2-7x+5}{x^2+2x-3}$
$z^2+28z$
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