$\left(sec23\:+\:cos23\right)\:\left(sec23\:-\:cos23\right)\:$
$\frac{6x-2}{5}>\frac{x}{2}-1$
$\frac{dy}{dx}-x=x^2-y$
$6x^2+5x=31$
$\lim_{x\to0}\left(\frac{1}{\sin\left(2x\right)}-\frac{1}{1-e^x}\right)$
$12x>-36$
$\int6^{4x}dx$
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