Hi there, This is the first time I have every asked for him in this forum or any regarding homework. I have done have of the sheet if anyone wants to see it, I can upload it. I am at the stage where I am required to simply logice gates, the thing is if I simplify I always things I might increase the combination or go wrong.

Simplify

• A Ú [B Ù (A Ú B)] Ú [ A Ù (~A Ú B) ]
• ~[ ~A Ú ~ (B Ù C)] Ú ( ~C Ù B)
• A Ú ~[(~B Ù~C) Ú ( ~BÙ ~D) ] Ú (~A Ù D)

If anyone could explian, I would really appreciate.

BTW
I have Created a table like so
A B
0 0
0 1
1 0
1 1
etc.

 

You should start reading up on Boolean algebra in our E-book, here:
http://www.allaboutcircuits.com/vol_4/chpt_7/3.html

You can also construct "truth tables" to show all of the inputs and outputs.