We can simplify the given expression using the following logarithmic rules:
log(a) + log(b) = log(ab)
log(a) - log(b) = log(a/b)
log(a^n) = n*log(a)
Using these rules, we can write:
log(12) - (log(9) + log(13) + log(8))
= log(12) - log(9138)
= log(12/9138)
= log(4/351)
Therefore, the single form equation for the expression is:
log(12) - (log(9) + log(13) + log(8)) = log(4/351)