$tany\left(coty+3cosy\right)$
$x-5<x-2$
$4x^2+4y^2-8x+48y+99=0$
$3x+-2\cdot6$
$l^2mas\:l^2$
$\frac{3x^3+2x^2-7+2}{x+2}$
$8x=4x+12$
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