If a + B = 4AB, then the value of the algebraic formula 2A AB + 2B / 2Ab is?

If a + B = 4AB, then the value of the algebraic formula 2A AB + 2B / 2Ab is?

2a-ab+2b/2ab
=[2(a+b)-ab]/2ab
=(2*4ab-ab)/2ab
=7ab/2ab
=7/2