$\left(e^{ix}+e^{-ix}\right)^5$
$16-104x^2-169x^4$
$m^2-3m-7\cdot m-8$
$\left(x+1\right)\left(x^2-3x+6y\right)$
$\frac{54a^4b^3c}{63a^2b^5c^2}$
$72x^2+36xy-27x$
$6xydx+\left(4y+9\right)dy=0$
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