Question

(3a+a3)2-a2(a-5)(a+5)+2a(8-3a2)

Answer 1

(3a+a³)²-a²(a-5)(a+5)+2a(8-3a²)
9a²+6a^4+a^6-a²*(a²-25)+16a-6a³
9a²+6a^4+a^6-a^4+25a²+16a-6a³
34a²+5a^4+a^6+16a-6a³
a^6+5a^4-6a³+34a²+16a