Hello everybody

I am rehearsing my skills with fractions, square roots and potencies. I have got a couple of problems and simplifications I'd like you to check and see if I am correct.

(first try with Latex...)

Ok another go...

Problem 1

I hope you can make out what I try to put in Latex language:

http://www.imageupload.se/files/070906/8778problem%201.JPG

Note: Space in url, copy and paste recommended.

Problem 2

(I can't solve this one)

Problem 3

(ditto)

Problem 4 (another simplification)

Problem 5

All replies are welcome

EDIT: NOTE. Problem 4 is modified, I wrote it incorrectly

P.S.

I'll add my solutions later, writing these problems took enough time.