algebra
posted by katelynn .
can someone explain how I would simplify (3a4  2a2 + 5a  10)(2a4 + 4a2 + 5a  2)? can anyone help? The #'s that come directly after a letter is the exponent.
I just need help understanding how to simplify problems like this...

3a^4(2a^4+4a^2+5a2)
2a^2(2a^4+4a^2+5a2)
+5a(2a^4+4a^2+5a2)
10(2a^4+4a^2+5a2)
6a^8 + 12a^6 + 15a^5  6a^4
4a^6  8a^4  10a^3 + 4a^2
+10a^5 + 20a^3 + 25a^2  10a
20a^4  40a^2  50a + 20
6a^8 + 8a^6 +25a^5 34a^4 +10a^3  11a^2  60a + 20
feel free to doublecheck my math, or using wolframaplha 
no i need it to be shorter?.

Factor completely. 25a^264