I have the following formula:

=IF(AND(D4<D3,D4<D5,E3>B3,E3>C4,C5>C4,),D3-10,0)

and I want to add a part to the formula that adds the following condition:

D4 = BK4 plus or minus 5

For example if BK = 100 I want the additional condition to be true if D4 is in the range 95-105 but I am not sure how to write this.