A list expression is:
list()
+
See Type conversion and casting.
Example:
list l = "hello",1; l; → [1]: → hello → [2]: → 1 l = list(); l; → empty list ring r =0,x,dp; factorize((x+1)^2); → [1]: → _[1]=1 → _[2]=x+1 → [2]: → 1,2 list(1,2,3); → [1]: → 1 → [2]: → 2 → [3]: → 3