Is it possible in Mathematica to take the
LCM of an algebraic expression? For example, I want to take the
LCM of $9$, $9y$, $12y^2$ and $27y^4$.
If I type in
LCM [9, 9y, 12y^2, 27^4]
it returns the same value. I'm running Mathematica version 9. Could you help me out?