short circuits : CD4081

Short Circuits : 4081

The CD4081 has four separate 2-input AND gates which you can use independently but not widely as CD4011.

AND gate Buffer

The above picture use the CD4081 as AND gate buffer the output logic same as the input logic (IN=OUT)

3 input AND gate

This is cascading to make 3 input AND gate
OUT = A*B*C

4 input AND gate

This is cascading to make 3 input AND gate
OUT = A*B*C*D