$2logx+log4=log\left(9x-2\right)$
$\frac{1}{2x}<4$
$2a^2\:5a^2\:4a^2$
$tan^2xsin^2x-tan^2x=-sin^2x$
$\left(3m^4-5m^6\right)^2$
$\frac{x^3+6x^2+13x-4}{x-3}$
$\left(-x^3+4\right)^3$
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