$x^2=6x-9$
$w^2+16w+25$
$\frac{dy}{dt}=3sin\left(3t\right)\left(y-2\right)$
$tan\left(2x\right)=-0.6798$
$\left(4m-20\right)\left(4m+20\right)$
$k^2-2k$
$\left(6f^28m\right)^2$
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