Simplify the following. `(5/6)^6 xx (5/6)^3 div (5/6)^9`

Simplify the following : (-18)div6

Simplify the following : 18div(-6)

Simplify the following: 2/3 xx 5/7div4/9

Simplify the following : 7/12+8/9-5/6

Simplify the following : (-18)div(-6)

Simplify the following : 15-6div2-5xx(-7)

Simplify the following : 3/7" of " 5""5/6

Simplify the following (1 to 6) : (-3)xx(-12)div(-4)+3xx6 .

Simplify the following: (i)\ (5^(n+3)-\ 6\ xx\ 5^(n+1))/(9\ xx\ 5^n-2^2\ xx\ 5^n) (ii)\ (6(8)^(n+1)+\ 16(2)^(3n-2))/(10(2)^(3n+1)-7\ (8)^n)

Simplify the following : 9-{7-24div(8+6xx2-16)} .