25^log(5)3)+0.04^log (0.2)8)-9^log(81)4)

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To solve this expression, we can first simplify the logarithms.

Using the properties of logarithms, we know that:

log(5)3 = log(3)/log(5)
log(0.2)8 = log(8)/log(0.2)
log(81)4 = log(4)/log(81)

Now, we can substitute these values back into the expression:

25^(log(3)/log(5)) + 0.04^(log(8)/log(0.2)) - 9^(log(4)/log(81))

Now, we can simplify further by using the properties of exponents:

25^(log(3)/log(5)) = (5^2)^(log(3)/log(5)) = 5^(2*log(3)/log(5)) = 5^(log(3^2)/log(5)) = 5^(log(9)/log(5))

Similarly, we can simplify the other terms in the expression.

After simplification, the final result will be a numerical value.