You can put this solution on YOUR website! (6x^4)^2
to square these exponents you multiply them so we get 36x^(4*2)
and
(2x^4)^3
4x^(12)
which gives us 36x^8*8x^12 so we combine
to multiply exponents we add them so we get
36x^8*8x^1236*8*x^(8+12)
36*8*x^(20)=288x^20