9 ^5/2 -3*8^0-(1/81)^-1/2
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answer = (3^2)^5/2)-3×(5)^0-{3^(-4)}^-1/2
= {3^(2×5/2}-3×1-[3^{-4(-1/2}]
= 3^5-3-3^2
= 243-3-9
= 231
I wish the answer may help you.
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