Answer:
30
Step-by-step explanation:
These are generally easier to evaluate by hand if they are simplified first.
... (4a^2)b -ab^2 -(3a^2)b +ab^2 -ab +6
... = (a^2)b(4 -3) + ab^2(-1 +1) -ab +6
... = a^2·b -ab +6
... = ab(a -1) +6
... = (-3)(2)(-3-1) +6
... = (-6)(-4)+6
... = 24 +6 = 30
