$9k^2-6k+1$
$\sqrt{t^3}$
$\tan3x=1$
$\left(1+2b\right)^5$
$3\cdot2n-1+1$
$\frac{dy}{dx}x^2-y^2$
$\frac { ( 3 ) - 2 } { 3 \cdot ( 3 - 3 ) }$
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