6a^5*b^5*8a^4*b^8
_______________ =?
(2a^2*b^3)^4

[tex] \frac{16 \times 3 \times {a}^{9} \times {b}^{13} }{16 \times {a}^{8} \times {b}^{12} } = 3ab[/tex]