I am to create a net using only NAND gates to achieve the function u=D+CB'A'=/De Morgan/=
(D'(CB'A')')'

All my attempts to create the function u has resulted in nets using far more NAND gates that seem logical (Using the NAND gate combinations in order to replicate other types of gates). The task is to use only the minimum amount of NAND gates and all NAND gates have 2 inputs.

Any solutions or tips? if you post a solution please explain the though process so I learn until next time

 

Homework Help forum of AAC is to assist you with your homework, not to do your homework for you.
Start by drawing logic circuit schematics using 2-input gates and then try substituting with De Morgan gate equivalents.

 

Look at the function after using De Morgan.
It has only AND-functions and inversions.
You can make an inverter from single NAND gate and 3-input NAND from three 2-input NAND gates.