The leading coefficient is 3*8*4*2 = 192.
The index (degree) of "a" is 1 + 3 + 1 + 3 + 3 = 11.
The index (degree) of "b" is 2 + 1 + 2 + 1 + 1 = 7.
The final simplified expression is 192*a^11*b^7. ANSWER
Solved.
Consider it as a SAMPLE on HOW TO perform
such assignments without turning them into tortures.