Answer:
1.) [tex]4a ^{4} + 12a^{2}x + 9x^{2} [/tex]
2.) [tex]64c^{3} - 47cy + 9y^{2} [/tex]
3.) [tex]16a^{2}b^{2} - 4x^{2} [/tex]
4.) [tex]64x^{2} - 49a^{2}[/tex]
5.) [tex]121d^{2} - 81e^{2} [/tex]
Hope it helps=)
For me I'm sure that all of this is correct
