int dx/(3 * x - 2 - x^2) = -int dx/(x^2 - 3 * x + 2) = -int dx/((x - 1) * (x - 2)) =
= -int ((x - 1) - (x - 2))/((x - 1) * (x - 2)) dx =
= -int dx/(x - 2) + int dx/(x - 1) = -ln |x - 2| + ln |x - 1| + C =
= ln |(x - 1)/(x - 2)| + C