### 2.25.10 LCM of two polynomials : `lcm`

`lcm` returns the LCM (Least Common Multiple) of two polynomials (or of a list of polynomials or of a sequence of polynomials) (see 2.6.5 for LCM of integers).
Input :

`lcm(x```^```2+2*x+1,x```^```2-1)`

Output :

`(x+1)*(x```^```2-1)`

Input :

`lcm(x,x```^```2+2*x+1,x```^```2-1)`

or

`lcm([x,x```^```2+2*x+1,x```^```2-1])`

Output :

`(x```^```2+x)*(x```^```2-1)`