$\frac{16}{x^2-16}=\frac{2}{x-4}$
$\left(w\:+\:2\right)\left(w\:-\:5\right)$
$\left(x^3+y^3\right)\left(7x+2\right)$
$\int\sqrt{1211-t^2}dt$
$6x^2+7x-2=0$
$=\frac{1+\tan\left(x\right)^2}{\sec\left(x\right)^2\cdot\cot\left(x\right)^2}$
$5\:-\:6\:\:\frac{2}{3}$
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