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предложение со словом lifetime

Pomogite perevesti 

I'm afraid I have to disagree with the people who
say that the Internet is better than any other
medium. Yes, okay, it's good but if we never
read books, magazines or newspapers, if we do
not watch TV or listen to the radio the world
wouldn't be that great a place! The Internet is
wonderful if you search for information. It is
useful for homework and revision as well.
I think the Internet is great for a research. But
... newspapers or magazines can't stop working
suddenly ... Plus, there is something special
about getting a magazine you really wanted. What can be better than sitting down
with it and reading it in peace and quiet4? Also, if I stare at the computer screen
for too long, it hurts my eyes!!
Sue

ну надо люди пожалуйста срочно надо   1)30%от 30%числа b равны 8.1 найдите число b                          2) вычислите 0.63*0.15*0.44/0.03*0.88*0.81                3)уровнениие 4/7x+5/14x-10/21x=2 5/7

Упростите выражение 7 класс!!!

[tex](1+\frac{x}{y}+\frac{x^2}{y^2})(1-\frac{x}{y})\cdo\cdot\frac{y^3}{x^3-y^3}[/tex]