0.25^9*64^3*(-1/2)^-2*7^0=?

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0.25^9*64^3*(-1/2)^-2*7^0=?
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0.25^9*64^3*(-1/2)^-2*7^0=?
0.25^9*64^3*(-1/2)^-2*7^0=?

0.25^9*64^3*(-1/2)^-2*7^0=?
0.25^9*64^3*(-1/2)^(-2)*7^0
=(1/4)^9*(4^3)^3*4*1
=(1/4)^9*4^9*4*1
=(1/4*4)^9*4
=4

70.000000000000

0.25^9*64^3*(-1/2)^﹙-2*7^0﹚=2^﹙-18﹚×2^18-2²×1=2º-4=1-4=﹣3