Hi NanyBany. I've moved your thread to the homework section, because I believe that's what it is.
you might like to try factoring the equation first (it's optional, but it looks like it would lead to a simpler result.
Then, I assume you've done enough
Boolean algebra to know how to convert an AND to an OR, and vice versa. I also assume you know how to invert a logic state using the NAND function.
Armed with this knowledge you can directly implement the logic function.
The final step (again optional) is to simplify the resulting gates. Can you think of one obvious simplification already?