`((38)/(65))xx((255)/(144))div((19)/(5))+((14)/(19))=?`

(13)/(63) div (104)/(14) xx(52)/(19)=?

(14)/(19)xx(57)/(70)xx(20)/(21)=?

Evaluate: ((32)/(65)xx(13)/(16))-((-15)/(42)div(30)/(63))+((28)/(34)xx(-68)/(14))

Which part contains the fractions in ascending order? (11)/(14),(16)/(19),(19)/(21) (b) (16)/(19),(11)/(14),(19)/(21) (c) (16)/(19),(19)/(21),(11)/(14) (d) (19)/(21),(11)/(14),(16)/(19)

Simplify: ((15)/(28) xx (- 119)/(9)) + ((-19)/(20) xx (-30)/( - 57)) + ((- 39)/( 3) xx (14)/(5) xx (-12)/( 56))

A box contains 10 black and 10 white balls. What is the probability of drawing 2 balls of the same colour? (9)/(19) (b) (9)/(38) (c) (10)/(19) (d) (5)/(19) (e) None of these

Express the following product in exponential form. a. (-5)^(14)xx(-7)^(14) b. (a)^(19)xx(-b)^(19) c. (3)^(21)xx5^(21) d. (6)^(9)xx(5)^(9) e. (x)^(13)xx(-y)^(13) f. (-7)^(32)xx(-9)^(32)

(-157)xx(-19)+157=