(3/4)^6:(3/4)^4=(3/4)^6-4=(3/4)^2=9/16 --- A
(1/2)^8:(1/2)^4=(1/2)^8-4=(1/2)^4=1/16 --- F
(2/5)^10:(2/5)^10= 1 --- F
(1/3)^6:(1/3)^1=(1/3)^6-1=(1/3)^5=1/243 --- F
(3/2)^6:(3/2)^6=1 --- A
(5/6)^20:(5/6)^18=(5/6)^20-18=(5/6)^2=25/36 --- A
(10/3)^30:(10/3)^27=(10/3)^30-27=(10/3)^3=1000/27 --- F
(1/20)^6:(1/20)^3=(1/20)^6-3=(1/20)^3=1/8000 ---F
(3/5)^7:(3/5)^2=(3/5)^7-2=(3/5)^5=243/3125 --- F