Maya 3D Model of Unity I see evil

I created a model of a house and I used the Boolean>Difference to dig the polygon. But when I move the file casa.mb in unity I see the polygons that "pierced" the main polygon, although Maya rightly disappeared. How do I do? Thanks!

Try exporting as an FBX file...

THen put into Unity.

Delete the objects history in Maya

ok it worked thanks