New Angler Fish

Congratulations, you got a friend for Jerry and now they share a new habitat. But the first mate still has more problems for you to help him with. If you help him with the problems below, he'll show you a picture of a new species of Angler Fish discovered in June of this year!

Good luck!

Use symbols *, / & ^ for multiplication, division & power.
Put numbers first, then variables.
Use parentheses only when necessary.
For example: 23*x^2/(7*y)

Problem 14 (expression for ?):

Problem 15 (expression for ?):

Solve these problems to see the new angler fish!
 

Jerry Gets a Friend!

The first mate is so happy with you for helping him with his math problems that he has offered to give you his pet marsupial mole so Jerry will have a friend! The only problem is that the habitat you built for Jerry is not big enough. The current habitat is six feet by nine feet and you need to double the area so it can hold two marsupial moles. You decided to increase both the length and width by the same amount. How many feet should you increase each dimension to double the area?