$\sin\left(x\right)=-\frac{20}{29}$
$\lim_{x\to1}\left(\frac{x^3-x^2+x-1}{x^2-1}\right)$
$\frac{d}{dx}8\sqrt{3-x^2}$
$7\cos\:\left(x\right)-1=10\left(1-\cos\:\left(x\right)\right)$
$\left|-8\right|-\left(-12\right)$
$\tan^2\left(x\right)+\cos^2\left(x\right)=\sec^2\left(x\right)+\csc^2\left(x\right)-2$
$\left(x^n+9\right)\left(x^n-3\right)\:$
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