`(-2)^(-3)xx(-2)^(-2)` is equal to

{(1/5)^(-2)-(1/4)^(-3)}xx((-1)/2)^(-4) is equal to

(2/3)^(3)xx(5/7)^(3) is equal to

(64)^ (-2/3) xx (1/4)^(-2) is equal to :

If 9^(3)xx 27^(2)xx 81^(2) is equal to 3^(2k) , then find k.

((225)^(0.2)xx(225)^(0.3))/((225)^(0.8)xx(225)^(0.2)) is equal to :

Vectors a and b are inclined at an angle theta=120^(@) . If |a|=1, |b|=2 , then [(a+3b)xx(3a+b)]^(2) is equal to

(4/9)^2xx((-3)/2)^3 is equal to