How would I simpifly fully and state the restrictions for the following?

Question

A) 2a^3 b^4 B) -15w^3 r^5
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10ab^2 -3w^2 r

Answer 1

(2a^3b^4)/(10ab^2) = (2/10)(a^3/a)(b^4/b^2) = (1/5)(a^3)(b^2)

a^3/(5b^2)

(-15w^3r^5)/(-3w^2r) = 5wr^4

Answer 2

2a^3b^4/10ab^2
= a^2b^2/5 <-- There are no restrictions after simplifying

-15w^3r^5/-3w^2r
=5wr^4 <-- There are no restrictions after simplifying

Before simplifying, a and b and w and r cannot zero.

Answer 3

All the expressions are fully simplified and there is no restriction.