$2x>6$
$12-75x^4$
$log\left(y-6\right)-log\left(y-4\right)+log\left(2\right)-log\left(x-3\right)$
$14.45\cdot9$
$\frac{\left(x^2-8x-17\right)}{x-2}$
$4x^2+4x-285$
$\csc^2a\:\tan^2a-1$
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