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2³⁰+2²⁹+2²⁸/2³¹+2³⁰-2²⁹
= 2²⁸(2²+2+1)/2²⁹(2²+2-1)
= 4+2+1/2(4+2-1)
=7/2*5
=7/10
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Answer:
this is the answer, i.e.7/10
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