8a3a2−4a−5−5a(a−2)= ???

 

\(8a^3a^2 - 4a-5-5a(a-2) = \)

\(8a^5 - 4a - 5 -5a^2-2a = \)

\(8a^5 -5a^2 - 6a - 5 \)

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