I'm confused by the evaluation order of polynomials containing division. Consider these two polynomials:
(x^2 + y) z/w (1) a/b (2)
And their tree form:
TreeForm[(x^2 + y) z/w]
I understand that division is
x^-1 which has higher evaluation precedence. But why in the tree form, the power of
w^-1 (in the first polynomial) is in the first position, while
b^-1 (in the second polynomial) is in the second position?