a3 squared if a = 7?

do you mean

 

$$\\(a^3)^2\qquad if\;\; a = 7?\\\\\\
(7^3)^2=7^6$$

 

$${{\mathtt{7}}}^{{\mathtt{6}}} = {\mathtt{117\,649}}$$

ok!so here we will put 7 in a's place and solve

 

a3 squared if a = 7

 

that is a3^2  if a = 7

 

so 73^2 

 

= 5329

 

is that what you want?