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=3 log 3 + 3 log 3 + 3 log 3 + 3 log 3 + 3 log 2 -3 log 2
=1+1+1+1
=4
3 log 9 x 18 /2 = ³ log 81 = 4
2. log 8 + log 400 - log 32
= log 400 × 8 ÷ 32
= log 3200 ÷ 32
= log 100
= 2