Simply the following expressions. Your answer should contain only positive exponents.

1. |-y^2| = y^2
2. |-1/(b^4)| = 1/(b^4)
3. 4/(a^6 b^2)
4. p^4 q^5 r^2
5. 1/(d^3)
6. x^3/4 / y
note: it says that the answers should contain only positive, thats why i used absolute value on the 1st and 2nd number. ^^ also please re-check it.