$\lim_{x\to\frac{\pi}{-2}}\left(\frac{sec\left(x\right)-1}{tan\left(x\right)}\right)$
$9\left(2x\:-\:3\right)\:=\:7\left(x\:+\:4\right)$
$\left(-2x-8\right)\cdot\left(-2x+8\right)$
$\frac{2x^4}{x^2-3}$
$x^2+5x=4$
$8\left(2x-1\right)$
$w^8-35w^4+304$
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