I have done the K-Maps and i'm trying to simplify the equations i have from them to reduce the number of gates i need, but i am getting stuck.

The equation is -x + -wyz + wy-z + wz-y + x-y-z

I keep factoring out and am left with -x + (w+x) but this does not work on the display. The programme i am using to build it is logic works 4.0.

Any and all help will be much appreciated. Thanks.