or
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log27+log8-log1000log1.2
= log 33 + log 23 - log 2 ×53log 1210
= log 332 + log 23 - log 23 × 53log 65
= 32log 3 + 3 log 2 - log 232×532 log 6 - log 5
= 32log 3 + 3 log 2 - log 232×532 log 6 3 ×2 - log 5
= 32log 3 + 3 log 2 - 32 log 2 - 32 log 5log 3+ log 2 - log 5
= 32log 3 + 32 log 2 - 32 log 5log 3+ log 2 - log 5
= 32log 3 + log 2 - log 5log 3+ log 2 - log 5 = 32 (answer)
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