$\left(x+1\right)\left(x-1\right)\left(x^2+2\right)$
$\tan\left(x\right)\left(1-\sin^2\left(x\right)\right)=\frac{1}{2}\sin\left(2x\right)$
$\left(5g\:-\:3q\right)\left(8g\:+\:b\right)$
$\frac{x^4-16}{x^2+4}$
$\lim_{x\to1}\left(\frac{2ln\left(x\right)}{1-e^{x-1}}\right)$
$sin\left(x\right)cos\left(x\right)+cos^2\left(x\right)cot\left(x\right)=cot\left(x\right)$
$\lim_{x\to0}\left(\frac{x-\arctan x}{x-\arcsec x}\right)$
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