a.
$\phantom{X}a^{\large 2}\,+\,4a\,+\,4\phantom{X}$
b.
$\phantom{X}9a^{\large 2}\,+\,30ab\,+\,25b^{\large 2}\phantom{X}$
c.
$\phantom{X}1\,-\,18x^{\large 2}\,+\,81x^{\large 4}\phantom{X}$
d.
$\phantom{X}a^{\large 3}\,+\,27\phantom{X}$
e.
$\phantom{X}64\,-\,x^{\large 3}\phantom{X}$
