Question 734551
(4x^2)^3 = (4^3)*(x^2)^3


(4x^2)^3 = 64*x^(2*3)


(4x^2)^3 = 64*x^6


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(y^3)^5 = y^(3*5)


(y^3)^5 = y^(15)


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2(4x^2)^3 * (y^3)^5


2(64*x^6) * (y^(15))


(2*64) * x^6 * (y^(15))


128 * x^6 * y^(15)


So that's why the answer is {{{128x^6y^15}}}