Question 1031292
condense to a single logarithm 
log9 x+log9 y+log9 z
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I just did this one.
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condense to a single logarithm
3log4 a-log4 b
= {{{log(4,a) + log(4,a) + log(4,a) + log(4,b)}}}
= {{{log(4,a*a*a + b)}}}
= {{{log(4,a^3b)}}}