$\lim_{x\to0}\left(\frac{1-\sin\left(2x\right)}{\tan\left(x\right)}\right)$
$\left(\left(a\:+\:b\right)^2\:+\:c^2\right)^2$
$\tan\left(v\right)+\cot\left(v\right)=\frac{2}{\sin\left(2v\right)}$
$\frac{0^4}{4}$
$1\sin x=\frac{\cos^2\left(x\right)}{1+\sin\left(x\right)}$
$\frac{\cos x}{1-\sin x}+\frac{\cos x}{1+\sin x}=\frac{2}{\cos x}$
$\left(2x-4\right)\left(5x^2-6x-4\right)$
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