Помогите мне, пожалуйста! Срочно!!! Упростите выражение: 3/x-3 - x-15/x²-9 - 2/x=

3/(x-3) - (x-15)/(x²-9) - 2/x = 3/(x-3) - (x-15)/(х-3)(х+3) - 2/x = 3х(х+3)/(x-3) - х(x-15)/(х-3)(х+3) - 2(х-3)(х+3)/x =[ 3х(х+3)- х(x-15) - 2(х-3)(х+3) ]/x(х-3)(х+3) = (3х^2 + 9х - х^2 + 15х - 2(х^2 - 9))/x(х-3)(х+3) = (3х^2 + 9х - х^2 + 15х - 2х^2 + 18)/x(х-3)(х+3) = (3х^2 - 3х^2 + 9х + 15х + 18)/x(х-3)(х+3) = (24х + 18)/x(х-3)(х+3) = 6(4х+3)/x(х-3)(х+3)