$\frac{-4x^4+20x^3-24x^2-2}{-2x^2+2x+1}$
$\left(m+3ny^{x+1}z^n\right)^5$
$y^2+9y=0$
$\frac{\sec\:\left(x\right)^2-1}{\sec\left(x\right)^2}$
$-x^4+16$
$\lim_{x\to16}\left(\frac{\sqrt[4]{x-2}}{x-16}\right)$
$f^2-3f^2+4f-12$
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