(216^n) / (2^3n+2 * 3^3n-4)= (24*9)^n / 2^3n+2 * 3^3n-4= (24*3^3)^n / 2^3n+2 * 3^3n-4= (6*2^2*3^3)^n / 2^3n+2 * 3^3n-4= 6*2^2n*3^3n/ 2^3n*2^2*3^3n*3^ -4= 6*2^2n*3^4/ 2^3n*2^2= 6*2^ -1*3^4/ 2^2= 6*3^4/ 2^2*2=486/8= 60,75