Please simplify 6^-2÷216^-2/3 + 3^-1÷243^-1/5 + 4^-3÷256^-3/4
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6^-2÷216^-2/3 + 3^-1÷243^-1/5 + 4^-3÷256^-3/4
=0.0277/0.0277+0.33/0.33+0.0156/0.0156
=1+1+1
=3
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