$a)4^2=16$

$5^2=25$

$6^2=36$

$8^2=64$

$0^2=0$

$3^2=9$

$9^2=81$

 

$b)3^3=27$

$2^3=8$

$5^3=125$

$4^3=64$

$0^3=0$

$1^3=1$

${10}^3=1000$

 

$c)3^2\cdot 3=27$

$3^2\cdot 3=3^3$

$4^2\cdot 4=4^3$

$4^2\cdot 4=64$

$5^2\cdot 5=5^3$

$5^2\cdot 5=125$

${10}^2\cdot 10={10}^3$