Hello everyone.

I have yet another pile of mathematics homework, and currently working on it. I need some confirmation and, if so, help on the following - can they be simplified any more than I have done?

1.

=

=

= Is this correct?

2.

= ?

3.

= Help please!

=

4.

= I am not sure on this...

5.

= Explanation and guidance on this one...

6.

= Same as #5

Thank you so much to all who help me in this dilemma!