2 log (a*b)
log(a*b)^2
log(a*b)^2 при a = -1/3
подставляем
переменные
a = -1/3
2 log ((-1/3)*b)
2/-b \ log |---| \ 3 /
log(-b/3)^2
2 (log(a) + log(b))
(log(a) + log(b))^2