$\cos2\theta-3=-7\cos\theta$
$\left(x^2-4\right)\left(x^3+2x^2-4x+8\right)$
$\left(3a-2b^2-c^n\right)^2$
$cos^2\theta\:\left(1+tan^2\theta\:\right)$
$\lim_{x\to6}\left(\frac{x^2-x-30}{x^2-16x-60}\right)$
$\left(4u^3+2\right)\left(5u^3+3\right)$
$\left(x^3\right)\left(y^3\right)^{-7}$
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