a) (2•6)^2= 2^2•6^2=4•36=144
b)3^3•5^2=3^2•3•5^2=(3•5)^2•3=15^2•3=225•3=675
c)4^2:2^4= (2^2)^2: 2^4= 2^4:2^4=1
d) (8^2)^2= (2^6)^2= 2^12
e)(1^3)^5=1^15=1
f) 7^3-5^3= 343-125= 218
g) 3•3^4= 3^5= 9•27= 243
h) (2^3)^2•4= 2^6•2^2= 2^8
i) 125:5^2= 5^3:5^2= 5
j) 6^6:(2^5•3^5)=(2•3)^6:(2•3)^5= 2•3= 6
