Answer:
1st : 16x^3 + 9x^2 + 13x + 13
2nd : 16x^3 + 9x^2 + 13x + 16
Explanation:
 6x^3 + 8x^2 - 2x + 4 
+10x^3 + x^2 + 11x + 9
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 16x^3 + 9x^2 + 13x + 13
 + 3
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 16x^3 + 9x^2 + 13x + 16