Quote Originally Posted by AlexAK View Post
"The researches have found out that it is comfortable but expensive to study in London.
Are you referring to researchers (the people doing the research) or to research (plural)?
ie: The research shows that it is...
Researchers have found out...

...London is comparable to Paris in a standard of life, university’s reputation and other index, but inferior to the fee of education.
Better to say: London is comparable to Paris in its standard of life, the reputation of its universities and other areas (not sure what you mean by "index" here) but inferior in the cost of education.

The list of 50 the most comfortable place for students was made up by analysis of the cities crowded with more than 250 thousand people, where there are two or more international standard universities.
The list of the 50 most comfortable places for students, comes from an analysis of cities...

...the number of high schools in London including Imperial College London, University College London, King's College London has exceed the same index in Paris.
should be: ... has exceeded

Again, "index" - numbers maybe?

However the average fee of education in London for foreigners, who are from a country that is not included in EU, is fixed about 20 thousand pounds per year (30 thousand dollars). At the same time, the average fee in Paris is fixed about 1000 thousand pounds.
Should be: ...average cost of education...

Nevertheless, London and Paris has got the same points in index such a standard of life, quality of student life and university rankings."
not "has got" but have

**Index may be OK to use, depending on the type of document this is and who will be reading it. It's a statistical term.