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= ²log((12 x 7) / 3)
= ²log(84/3)
= ²log28
= ²log(4.7)
= ²log4 + ²log7
= 2 + ²log7
==========
³log5 . ⁵log9 + ²log(1/2)
= ³log9 + ²log2⁻¹
= 2 + (-1)
= 1