$Y = (  $A  or  ($B and $C) );

Y | A B C D
0 | 0 0 0 0
0 | 0 0 0 1
0 | 0 0 1 0
0 | 0 0 1 1
0 | 0 1 0 0
0 | 0 1 0 1
1 | 0 1 1 0
1 | 0 1 1 1
1 | 1 0 0 0
1 | 1 0 0 1
1 | 1 0 1 0
1 | 1 0 1 1
1 | 1 1 0 0
1 | 1 1 0 1
1 | 1 1 1 0
1 | 1 1 1 1

 $Y = (  $A  or  ($B^1  or  ($C and $D)^1) );

Y | A B C D
1 | 0 0 0 0
1 | 0 0 0 1
1 | 0 0 1 0
1 | 0 0 1 1
1 | 0 1 0 0
1 | 0 1 0 1
1 | 0 1 1 0
0 | 0 1 1 1
1 | 1 0 0 0
1 | 1 0 0 1
1 | 1 0 1 0
1 | 1 0 1 1
1 | 1 1 0 0
1 | 1 1 0 1
1 | 1 1 1 0
1 | 1 1 1 1

 $Y = (  $A and ($B and ($C^1 or $D)^1) );

Y | A B C D
0 | 0 0 0 0
0 | 0 0 0 1
0 | 0 0 1 0
0 | 0 0 1 1
0 | 0 1 0 0
0 | 0 1 0 1
0 | 0 1 1 0
0 | 0 1 1 1
0 | 1 0 0 0
0 | 1 0 0 1
0 | 1 0 1 0
0 | 1 0 1 1
0 | 1 1 0 0
0 | 1 1 0 1
1 | 1 1 1 0
0 | 1 1 1 1