Using commutativity and associativity of addition of rational numbers, express each of the following as a rational number: `2/5+7/3+(-4)/5+(-1)/3` (ii) `3/7+(-4)/9+(-11)/7+7/9`

Using commutativity and associativity of addition of rational numbers, express each of the following as a rational number: 4/3+\ (-4)/5+\ (-2)/3+7/5-2

Using commutativity and associativity of addition of rational numbers, express each of the following as a rational number: 3/5+\ (-7)/6+2/5+\ (-5)/6

Using commutativity and associativity of addition of rational numbers, express each of the following as a rational number: 2/5+8/3+(-11)/(15)+4/5+(-2)/3 (ii) 4/7+\ 0+(-8)/9+(-13)/7+(17)/(21)

Using commutativity and associativity of addition of ration of numbers,express each of the following as a rational number: (3)/(5)+(-7)/(6)+(2)/(5)+(-5)/(6)

Using commutativity and associativity of addition of ration of numbers,express each of the following as a rational number: (4)/(3)+(-4)/(5)+(-2)/(3)+(7)/(5)-2

Using commutativity and associativity of addition of rational numbers,express each of the following as a rational number: (2)/(5)+(8)/(3)+(-11)/(15)+(4)/(5)+(-2)/(3) (ii) (4)/(7)+0+(-8)/(9)+(-13)/(7)+(17)/(21)

Simplify and express each of the following as a rational number : (7^(2))/( 7^(5))

Simplify and express each of the following as a rational number : (5^(7))/(5^(3))

Express each of the following as rational number : (a) (-5/7)^(-4) (b) (2/3)^(-2)

Verify commutativity of addition of rational numbers for each of the following pairs of rational number : 4 and (-3)/(5)-4 and (4)/(-7)