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470a^{3}+4ab-12a
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470a^{3}+4ab-12a
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472a^{3}-2a\left(a^{2}-2b+6\right)
Use the distributive property to multiply -2 by b-3.
472a^{3}-2a^{3}+4ab-12a
Use the distributive property to multiply -2a by a^{2}-2b+6.
470a^{3}+4ab-12a
Combine 472a^{3} and -2a^{3} to get 470a^{3}.
472a^{3}-2a\left(a^{2}-2b+6\right)
Use the distributive property to multiply -2 by b-3.
472a^{3}-2a^{3}+4ab-12a
Use the distributive property to multiply -2a by a^{2}-2b+6.
470a^{3}+4ab-12a
Combine 472a^{3} and -2a^{3} to get 470a^{3}.
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