$\frac{1\:+\:\cos\left(2a\right)\:+\:\sin\left(2a\right)}{1\:-\:\cos\left(2a\right)\:+\:\sin\left(2a\right)}=\cot\left(a\right)$
$3x+5<20$
$8x^6-27y^3$
$54z^2-252z+294$
$\int_0^{2\pi}\:\frac{1}{2}\left(cos\left(2x\right)\right)dx$
$3x+7=-7+9y$
$\lim_{x\to0}\left(\frac{x^2+498x}{6sinx}\right)$
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