gimana caranya logaritma ini

Logaritma

⁵log 50 + ⁵log 30 - ⁵log 12  + ²log 64 =
= ⁵log (50 x 30 : 12) + ²log 2⁶
= ⁵log 125 + 6. (²log 2)
= ⁵log 5³ + 6(1)
= 3 (⁵log5 ) + 6
= 3(1) +6
= 3 + 6
= 9