因式分解,只有三題！請各位湧躍進來-20點！！

1. ( 1 + y )^2 - 2x^2( 1 + y^2 ) + x^4( 1 - y )^2
2. abcx^2 + ( a^2b^2 + c^2 )x + abc
3. ( ax + by + ay )^2 + ( bx - ay )( ax + by + ay )+( ay - bx )^2