[(2/13)-6÷(2/13)3]3 × (2/13)-9 = (2/13)-36
Explanation: [(2/13)-6÷(2/13)3]3 × (2/13)-9
= [(2/13)-6-3]3 × (2/13)-9
= [(2/13)-9]3 × (2/13)-9
= (2/13)-9×3 × (2/13)-9
= (2/13)-27 × (2/13)-9
= (2/13)-27-9
= (2/13)-36
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