Show work for equations

I need help with these equations; i am having troubles on how to show my work... or more likely I don't know how too.



What is the simplified form of the expression?


11. (3q2)4


12. (3xy3)2(xy)6

I think you want to ask about
(3q^2)^4 and (3xy^3)^2*(xy)^6
11. (3q^2)^4=
=3^4*q^(4*2)
=3*3*3*3*q^8
=81q^8
12. (3xy^3)^2*(xy)^6
=3^2*x^2*y^(3*2)*x^6*y^6
=9x^8y^12

These are not equations, but they can be simplified.
Hum, are there exponents in these expressions? If so, they should be written as x^2 which means x squared.