`((2)/(3))^(2)xx((1)/(4))^(3)xx((3)/(4))^(2)`

(-(2)/(3))^(2)xx(-(2)/(3))^(4)

(((2)/(3))^(3)xx(-(3)/(4))^(2))/([-(2)/(5)]^(3))

Find the sum (3)/(1xx2)xx(1)/(2)+(4)/(2xx3)xx((1)/(2))^(2)+(5)/(3xx4)xx((1)/(2))^(2)+... to n terms.

The sum of the series (1)/(3)+(1)/(3^(2)xx2)+(1)/(3^(3)xx3)+(1)/(3^(4)xx4)+... is :

Verify that: (2)/(3)xx(-(4)/(5)+(-(3)/(7)))=(2)/(3)xx(-(4)/(5))+(2)/(3)xx(-(3)/(7))

[((3)/(4))^(3)]-:((3)/(4))^(2)times((1)/(3))^(-2)times3^(-1)times((1)/(6))^(-1)

((2)/(11))^(4)times((4)/(3))^(2)times((3)/(2))^(3)

Simplify the following expression : ((3)/(2)xx(1)/(6))+((5)/(3)xx(7)/(2))-((13)/(4)xx(4)/(3))=?

(((-2)/(3))^(-2))^(3)times((1)/(3))^(-4)times3^(-1)times(1)/(6)

Simplify: (a) 108-:36 of (1)/(4)+(2)/(5)xx3(1)/(4) (b) (2)/(3)xx(5)/(6)+(4)/(9)-(3)/(4)+(2)/(9)xx(5)/(9)-:(2)/(9)