" Y25"14.999(1)/(7)+999(2)/(7)+999(3)/(7)+999(4)/(7)+999(5)/(7)+999(6)/(7)pi sqrt(10144)sin4(7)/(8)

(999(1)/(7)+999(2)/(7)+999(3)/(7)+999(4)/(7)+999(5)/(7)+999(6)/(7)) is simplified to (a)2997(b)5979(c)5994(d)5997

((1)/(5)+999(494)/(495)xx99)/(4)=?

((999)^(3)-1)/((999)^(2)-1)=?

(999(999)/(1000)xx7)

(2-(1)/(3))(2-(3)/(5))(2-(5)/(7))....(2-(997)/(999)) is equal to