Answer:
a^3 + b^3
Explanation:
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(a + b )(a^2 - ab + b^2)
Distribute
a*a^2 -a*ab+a*b^2 + b*a^2 -b*ab +b*b^2
Simplify
a^3 -a^2b +ab^2 +a^2b -ab^2+b^3
Combining like terms
a^3 +b^3
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