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= ²log4 + ²log6³ - ²log√100 - ²log70
= ²log4 + ²log216 - ²log10 - ²log70
= ²log( 4 x 216 x 1/10 x 1/70)
= ²log(864/700)
= ²log( 32 x 27 ÷ 7 ÷ 100)
= ²log2^5 + ²log3³ - ²log7 - ²log10²
= 5.²log2 + 3.²log3 - ²log7 - 2.²log10
= 5 x 1 + 3 ²log3 - ²log7 - 2.²log10
= 5 + 3 ²log3 - ²log7 - 2.²log10