$\int\:4sin^{\left(6\right)}\left(3x\right)cos^{\left(4\right)}\left(3x\right)dx$
$2.3\cdot10\left(-5\right)$
$\tan x\cdot\cot x=x$
$a^2+24am^2+144m^4x^4$
$\int\frac{1}{x-2\left(x+1\right)}dx$
$25a^2-81b^4$
$4x^2-12x>-9$
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