You already know that the passing score for the top universities is in the range between 235 to 275 points.
So, you have perfected the profile subjects and count on receiving the highest scores - from 90 to 100, but in that case, you will need to score 55-85 on the Russian language exam.
My methodology is based on a deep analysis of the exams and will enable you to achieve the following: if at the beginning your exam score is 40, than by the end of the course your result will be 75, if 60, than after the course it will definitely be 90 and more.
The dynamics of improvement will be visible almost immediately - from 40 points we will rise to 55 in two months, in three - to 65.