(7/9) ki power 7 divided (9/7) ki power -5
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(7/9) ki power 7 ÷ (9/7) kisi power -5
= (7/9) ki power 7 × (7/9) kisi power -5
=(7/9) ki power 7+(-5)
=(7/9) ki power 2
= 49/81
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