What's your lucky number?

4x1=

5-1=

3+1= 

2+2= 

1+3= 

10-6= 

2/8=

 2+3-1=

 5x6-28+2=

7-3=

2+3=

 just checking

3/15 -1=

 2+2+2+2-4=

 4=

1+1+1+1= 

 3+2-1=

So, what's the answer?
64 weren't you paying attention?