$\cos\left(b\right)\cdot\tan\left(b\right)$
$2x-1<x$
$y^2-5y=10$
$\cosh\left(2x\right)=\sinh^2\left(x\right)+1$
$2x+3x+12x$
$4\cos^2x-cosx=0$
$( x + 8 ) ( x - 3 )$
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