Simplify `(5(81)^(n+1)-3^(4n+5))/(3xx3^(4n)+(81)^n)`.

Simplify : (3xx9^(n+1)-9xx3^(2n))/(3xx3^(2n+3)-9^(n+1))

Simplify : (5^(n+4)-6xx5^(n+2))/(9xx5^(n+1)-5^(n+1)xx4)

Simplify : (5^(n+4)-6xx5^(n+2))/(9xx5^(n+1)-5^(n+1)xx4)

Simplify : (5^(n+3)-6xx5^(n+1))/(9xx5^(n)-5^(n)xx2^(2))

Simplify : (5^(n+3)-6xx5^(n+1))/(9xx5^(n)-5^(n)xx2^(2))

Simplify: (10xx5^(n+1)+25xx5^n)/(3xx5^(n+2)+10xx5^(n+1)) (ii) ((16)^7xx(25)^5xx(81)^3)/((15)^7xx(24)^5xx(80)^3)

Simplify: (3^5)^(11)xx(3^(15))^4-(3^5)^(18)xx(3^5)^5 , (16xx2^(n+1)-4xx2^n)/(16xx2^(n+2)-2xx2^(n+2))

Simplify :(3xx27^(n+1)+9xx3^(3n-1))/(8xx3^(3n)-5xx27^(n))