$\lim_{x\to1}\left(\frac{x^7-1}{x^{30}-1}\right)$
$10\left(-8\right)\left(-4\right)$
$8n+12+\left(-9\right)-\left(-6n\right)$
$1-tan^2\left(x\right)=0$
$\left(1-\cos\:\left(\theta\:\right)\right)\left(1+\sec\:\left(\theta\:\right)\right)$
$x-4\left(x^3+3x^2-21x-28\right)$
$-9\cdot32$
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