$5-\left(1+-8\right)$
$\left(-4c+7d\right)\left(-8v+7j\right)$
$6sec^2xtanx=8tanx$
$x^2+20x=-70$
$\frac{tan\:x\:-\:tan\:x\:sin^2x}{2sin\left(x\right)cos\left(x\right)}\:\:$
$y=\left(x-4\right)\left(1-x\right)^2$
$\frac{x^6-729}{x-3}$
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